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Picone DS, Côté N, Corney R, Sharman JE, Agharazii M, Goupil R. Accuracy of methods to estimate central aortic SBP via upper arm cuff: a systematic review and meta-analysis. J Hypertens 2024; 42:1598-1605. [PMID: 38747441 DOI: 10.1097/hjh.0000000000003770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2024]
Abstract
OBJECTIVES Central aortic BP may predict cardiovascular outcomes better than upper arm brachial BP. In recent years, technology has enabled central BP estimation by recording a peripheral BP waveform from a standard upper arm cuff. The accuracy of these devices is not well documented, and this study aimed to address this issue. METHODS This study was a systematic review, conducted according to PRISMA guidelines, of observational studies published between 2008 and 2023 that reported accuracy testing of cuff-based central BP devices, compared with reference invasive aortic BP. The primary analysis was stratified according to each commercially available device. Pooled estimates were calculated using random-effects models based on mean differences and standard errors. RESULTS Six thousand four hundred and fifteen studies were screened, and 27 studies met inclusion criteria (plus one unpublished study). This generated data for seven devices that are commercially available, which were tested among 2125 adult participants. There was very high heterogeneity when all devices were pooled ( I2 = 97.5%), and, when stratified by device, the accuracy of estimated central BP was highly device-dependent (range of accuracy across different devices -12.4 mmHg (-16.3 to -8.5) to 3.2 mmHg (0.2-6.1). Two of the seven commercially available devices had not undergone external validation testing. CONCLUSION The accuracy of commercially available cuff-based central BP devices is highly device-specific and not all are accurate for the estimation of central SBP. These findings have major implications for the appropriate interpretation of studies that use cuff-based estimated central BP.
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Affiliation(s)
- Dean S Picone
- School of Health Sciences, University of Sydney, Sydney
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Nadège Côté
- CHU de Quebec - Université Laval research center, Faculty of Medicine, Université Laval, Quebec City
| | - Raphaela Corney
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - James E Sharman
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Mohsen Agharazii
- CHU de Quebec - Université Laval research center, Faculty of Medicine, Université Laval, Quebec City
| | - Rémi Goupil
- Hôpital du Sacré-Coeur de Montréal, CIUSSS-du-Nord-de-l'Île-de-Montréal, Université de Montréal, Montreal, Canada
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2
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Liu R, Majumdar T, Gardner MM, Burnett R, Graham K, Beaulieu F, Sutton RM, Nadkarni VM, Berg RA, Morgan RW, Topjian AA, Kirschen MP. Association of Postarrest Hypotension Burden With Unfavorable Neurologic Outcome After Pediatric Cardiac Arrest. Crit Care Med 2024; 52:1402-1413. [PMID: 38832829 PMCID: PMC11326994 DOI: 10.1097/ccm.0000000000006339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
OBJECTIVE Quantify hypotension burden using high-resolution continuous arterial blood pressure (ABP) data and determine its association with outcome after pediatric cardiac arrest. DESIGN Retrospective observational study. SETTING Academic PICU. PATIENTS Children 18 years old or younger admitted with in-of-hospital or out-of-hospital cardiac arrest who had invasive ABP monitoring during postcardiac arrest care. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS High-resolution continuous ABP was analyzed up to 24 hours after the return of circulation (ROC). Hypotension burden was the time-normalized integral area between mean arterial pressure (MAP) and fifth percentile MAP for age. The primary outcome was unfavorable neurologic status (pediatric cerebral performance category ≥ 3 with change from baseline) at hospital discharge. Mann-Whitney U tests compared hypotension burden, duration, and magnitude between favorable and unfavorable patients. Multivariable logistic regression determined the association of unfavorable outcomes with hypotension burden, duration, and magnitude at various percentile thresholds from the 5th through 50th percentile for age. Of 140 patients (median age 53 [interquartile range 11-146] mo, 61% male); 63% had unfavorable outcomes. Monitoring duration was 21 (7-24) hours. Using a MAP threshold at the fifth percentile for age, the median hypotension burden was 0.01 (0-0.11) mm Hg-hours per hour, greater for patients with unfavorable compared with favorable outcomes (0 [0-0.02] vs. 0.02 [0-0.27] mm Hg-hr per hour, p < 0.001). Hypotension duration and magnitude were greater for unfavorable compared with favorable patients (0.03 [0-0.77] vs. 0.71 [0-5.01]%, p = 0.003; and 0.16 [0-1.99] vs. 2 [0-4.02] mm Hg, p = 0.001). On logistic regression, a 1-point increase in hypotension burden below the fifth percentile for age (equivalent to 1 mm Hg-hr of burden per hour of recording) was associated with increased odds of unfavorable outcome (adjusted odds ratio [aOR] 14.8; 95% CI, 1.1-200; p = 0.040). At MAP thresholds of 10th-50th percentiles for age, MAP burden below the threshold was greater in unfavorable compared with favorable patients in a dose-dependent manner. CONCLUSIONS High-resolution continuous ABP data can be used to quantify hypotension burden after pediatric cardiac arrest. The burden, duration, and magnitude of hypotension are associated with unfavorable neurologic outcomes.
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Affiliation(s)
- Raymond Liu
- Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Tanmay Majumdar
- Department of Medicine, Drexel University College of Medicine, Philadelphia, PA
| | - Monique M Gardner
- Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
- Department of Anesthesiology and Critical Care, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Ryan Burnett
- Department of Anesthesiology and Critical Care, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Kathryn Graham
- Department of Anesthesiology and Critical Care, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Forrest Beaulieu
- Department of Anesthesiology, Hospital of the University of Pennsylvania, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Robert M Sutton
- Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
- Department of Anesthesiology and Critical Care, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Vinay M Nadkarni
- Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
- Department of Anesthesiology and Critical Care, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Robert A Berg
- Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
- Department of Anesthesiology and Critical Care, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Ryan W Morgan
- Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
- Department of Anesthesiology and Critical Care, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Alexis A Topjian
- Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
- Department of Anesthesiology and Critical Care, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Matthew P Kirschen
- Department of Pediatrics, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
- Department of Anesthesiology and Critical Care, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
- Department of Neurology, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
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3
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Wu Z, Heffernan KS. Central blood pressure and peripheral augmentation index following acute submaximal arm versus leg exercise. Eur J Appl Physiol 2024:10.1007/s00421-024-05573-5. [PMID: 39133269 DOI: 10.1007/s00421-024-05573-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 08/06/2024] [Indexed: 08/13/2024]
Abstract
BACKGROUND Aerobic exercises like running and cycling may lower cardiovascular disease (CVD) risk through favorable effects on central blood pressure and vascular function. Arm ergometry is a popular exercise modality used in rehabilitation settings, but little is known regarding the central hemodynamic and vascular effects of this form of exercise. PURPOSE To compare the acute effects of leg versus arm exercise on central blood pressure and vascular function. METHODS Twenty-one participants (n = 11 female, Age 21 ± 3, BMI 24.5 ± 3.2 kg/m2) completed two visits to the Human Performance Laboratory. Central systolic blood pressure (cSBP), central diastolic blood pressure (cDBP), and peripheral augmentation index (pAIx) were measured using a brachial oscillometric blood pressure cuff with measures being taken before and after 20 min of acute moderate-intensity (submaximal) arm or leg cycling exercise. RESULTS There was a condition-by-time interaction for pAIx (p = 0.011). pAIx slightly increased following arm exercise but significantly decreased following leg exercise. There was a condition-by-time interaction for cDBP (p = 0.011). cDBP significantly decreased following arm exercise but increased immediately following leg exercise. There was no condition-by-time interaction for cSBP (p = 0.721). There were similar acute increases in cSBP immediately post-exercise for both conditions. CONCLUSION Arm exercise increased pAlx and decreased cDBP compared to leg exercise. As an increase in pAIx may increase left ventricular work and a reduction in cDBP may reduce coronary perfusion pressure, these findings suggest that a single bout of arm exercise may not have the same favorable acute effect on central hemodynamic load as a single bout of leg exercise.
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Affiliation(s)
- Zeyi Wu
- Department of Exercise Science, David B. Falk College of Sport and Human Dynamics, Syracuse University, Syracuse, NY, USA
| | - Kevin S Heffernan
- Department of Biobehavioral Sciences, Movement Science & Applied Physiology, Teachers College, Columbia University, 525 W 120th St, Building 528, New York, NY, USA.
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4
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Zuin M, Henkin S, Harder EM, Piazza G. Optimal hemodynamic parameters for risk stratification in acute pulmonary embolism patients. J Thromb Thrombolysis 2024; 57:918-928. [PMID: 38762710 DOI: 10.1007/s11239-024-02998-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/30/2024] [Indexed: 05/20/2024]
Abstract
Hemodynamic assessment of patients with pulmonary embolism (PE) remains a fundamental component of early risk stratification that in turn, influences subsequent monitoring and therapeutic strategies. The current body of literature and international evidence-based clinical practice guidelines focus mainly on the use of systolic blood pressure (SBP). The accuracy of this single hemodynamic parameter, however, and its optimal values for the identification of hemodynamic instability have been recently questioned by clinicians. For example, abnormal SBP or shock index may be a late indicator of adverse outcomes, signaling a patient in whom the cascade of hemodynamic compromise is already well underway. The aim of the present article is to review the current evidence supporting the use of SBP and analyze the potential integration of other parameters to assess the hemodynamic stability, impending clinical deterioration, and guide the reperfusion treatment in patients with PE, as well as to suggest potential strategies to further investigate this issue.
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Affiliation(s)
- Marco Zuin
- Department of Translational Medicine, University of Ferrara, Via Aldo Moro 8, Ferrara, 44124, Italy.
| | | | - Eileen M Harder
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Gregory Piazza
- Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
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5
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Chemla D, Agnoletti D, Attal P, Millasseau S, Blacher J, Jozwiak M. Assessing the Accuracy of Systolic Aortic Pressure Estimation From a Brachial Cuff Alone: A Comparison With Radial Tonometry. Am J Hypertens 2024; 37:549-553. [PMID: 38517132 DOI: 10.1093/ajh/hpae039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/06/2024] [Accepted: 03/19/2024] [Indexed: 03/23/2024] Open
Abstract
BACKGROUND A novel method for estimating central systolic aortic pressure (cSAP) has emerged, relying solely on the peripheral mean (MBP) and diastolic (DBP) blood pressures. We aimed to assess the accuracy of this Direct Central Blood Pressure estimation using cuff alone (DCBPcuff = MBP2/DBP) in comparison to the use of a generalized transfer function to derive cSAP from radial tonometry (cSAPtono). METHODS This retrospective analysis involved the International Database of Central Arterial Properties for Risk Stratification (IDCARS) data (Aparicio et al., Am J Hypertens 2022). The dataset encompassed 10,930 subjects from 13 longitudinal cohort studies worldwide (54.8% women; median age 46.0 years; office hypertension: 40.1%; treated: 61.0%), documenting cSAPtono via SphygmoCor calibrated against brachial systolic BP (SBP) and DBP. Our analysis focused on aggregate group data from 12/13 studies (89% patients) where a full BP dataset was available. A 35% form factor was used to estimate MBP = (DBP + (0.35 × (SBP-DBP)), from which DCBPcuff was derived. The predefined acceptable error for cSAPtono estimation was set at ≤ 5 mm Hg. RESULTS The cSAPtono values ranged from 103.8-127.0 mm Hg (n = 12). The error between DCBPcuff and cSAPtono was 0.2 ± 1.4 mm Hg, with no influence of the mean. Errors ranged from -1.8 to 2.9 mm Hg across studies. No significant difference in errors was observed between BP measurements obtained via oscillometry (n = 9) vs. auscultation (n = 3) (P = 0.50). CONCLUSIONS Using published aggregate group data and a 35% form factor, DCBPcuff demonstrated remarkable accuracy in estimating cSAPtono, regardless of the BP measurement technique. However, given that individual BP values were unavailable, further documentation is required to establish DCBPcuff's precision.
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Affiliation(s)
- Denis Chemla
- INSERM UMRS 999, Department of Cardiovascular Physiology, Hôpital Marie Lannelongue, 133 Avenue de la Résistance, 92350 Le Plessis-Robinson, France
| | - Davide Agnoletti
- Cardiovascular Internal Medicine, Department of Clinical and Surgical Sciences, University of Bologna, BolognaItaly
- Cardiovascular Medicine Unit, Department of Cardiac-Thoracic-Vascular Diseases, IRCCS AOU of Bologna, Bologna, Italy
| | - Pierre Attal
- Department of Otolaryngology and Head and Neck Surgery, Shaare-Zedek Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Sandrine Millasseau
- Pulse Wave Consulting, Cardiovascular Department, Saint Leu La Foret 95320France
| | - Jacques Blacher
- Research Center for Epidemiology and Biostatistics, Sorbonne Paris Cité (CRESS), Université Paris Cité, AP-HP, Diagnosis and Therapeutic Center, Hôtel-Dieu, 1, Place du Parvis Notre Dame, Paris 75004, France
| | - Mathieu Jozwiak
- Service de Médecine Intensive Réanimation CHU de Nice, Nice 06200France
- UR2CA, Unité de Recherche Clinique Côte d'Azur, Université Côte d'Azur, Nice 06200France
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6
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Jimenez R, Yurk D, Dell S, Rutledge AC, Fu MK, Dempsey WP, Abu-Mostafa Y, Rajagopal A, Brinley Rajagopal A. Resonance sonomanometry for noninvasive, continuous monitoring of blood pressure. PNAS NEXUS 2024; 3:pgae252. [PMID: 39081785 PMCID: PMC11287871 DOI: 10.1093/pnasnexus/pgae252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 06/10/2024] [Indexed: 08/02/2024]
Abstract
Cardiovascular disease is the leading cause of death worldwide. Existing methods for continuous, noninvasive blood pressure (BP) monitoring suffer from poor accuracy, uncomfortable form factors, or a need for frequent calibration, limiting their adoption. We introduce a new framework for continuous BP measurement that is noninvasive and calibration-free called resonance sonomanometry. The method uses ultrasound imaging to measure both the arterial dimensions and artery wall resonances that are induced by acoustic stimulation, which offers a direct measure of BP by a fully determined physical model. The approach and model are validated in vitro using arterial mock-ups and then in multiple arteries in human subjects. This approach offers the promise of robust continuous BP measurements, providing significant benefits for early diagnosis and treatment of cardiovascular disease.
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Affiliation(s)
- Raymond Jimenez
- Esperto Medical, Inc., 300 Spectrum Center Drive, Suite 400, Irvine, CA 92618, USA
| | - Dominic Yurk
- Department of Electrical Engineering, California Institute of Technology, 1200 East California Blvd, Pasadena, CA 91125, USA
| | - Steven Dell
- Esperto Medical, Inc., 300 Spectrum Center Drive, Suite 400, Irvine, CA 92618, USA
| | - Austin C Rutledge
- Esperto Medical, Inc., 300 Spectrum Center Drive, Suite 400, Irvine, CA 92618, USA
| | - Matt K Fu
- Esperto Medical, Inc., 300 Spectrum Center Drive, Suite 400, Irvine, CA 92618, USA
| | - William P Dempsey
- Esperto Medical, Inc., 300 Spectrum Center Drive, Suite 400, Irvine, CA 92618, USA
| | - Yaser Abu-Mostafa
- Department of Electrical Engineering, California Institute of Technology, 1200 East California Blvd, Pasadena, CA 91125, USA
| | - Aditya Rajagopal
- Esperto Medical, Inc., 300 Spectrum Center Drive, Suite 400, Irvine, CA 92618, USA
- Department of Electrical Engineering, California Institute of Technology, 1200 East California Blvd, Pasadena, CA 91125, USA
- Department of Biomedical Engineering, University of Southern California, 3650 McClintock Ave, Los Angeles, CA 90089, USA
| | - Alaina Brinley Rajagopal
- Esperto Medical, Inc., 300 Spectrum Center Drive, Suite 400, Irvine, CA 92618, USA
- Department of Electrical Engineering, California Institute of Technology, 1200 East California Blvd, Pasadena, CA 91125, USA
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7
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Celler BG, Yong A, Rubenis I, Butlin M, Argha A, Rehan R, Avolio A. Evaluation of the oscillometric method for noninvasive blood pressure measurement during cuff deflation and cuff inflation with reference to intra-arterial blood pressure. J Hypertens 2024; 42:1235-1247. [PMID: 38690876 DOI: 10.1097/hjh.0000000000003719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
There is little quantitative clinical data available to support blood pressure measurement accuracy during cuff inflation. In this study of 35 male and 5 female lightly anaesthetized subjects aged 64.1 ± 9.6 years, we evaluate and compare the performance of both the oscillometric ratio and gradient methods during cuff deflation and cuff inflation with reference to intra-arterial measurements. We show that the oscillometric waveform envelopes (OWE), which are key to both methods, exhibit significant variability in both shape and smoothness leading to at least 15% error in the determination of mean pressure (MP). We confirm the observation from our previous studies that K1 Korotkoff sounds underestimate systolic blood pressure (SBP) and note that this underestimation is increased during cuff inflation. The estimation of diastolic blood pressure (DBP) is generally accurate for both the ratio and the gradient method, with the latter showing a significant increase during inflation. Since the gradient method estimates SBP and DBP from points of maximum gradient on each OWE recorded, it may offer significant benefits over the ratio method. However, we have shown that the ratio method can be optimized for any data set to achieve either a minimum mean error (ME) of close to 0 mmHg or minimum root mean square error (RMSE) with standard deviation (SD) of <5.0 mmHg. We conclude that whilst cuff inflation may offer some advantages, these are neither significant nor substantial, leaving as the only benefit, the potential for more rapid measurement and less patient discomfort.
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Affiliation(s)
- Branko G Celler
- Biomedical Systems Research Laboratory, University of New South Wales
| | - Andy Yong
- Concord Repatriation Hospital, Cardiology, University of Sydney
- Faculty of Medicine, Health and Human Sciences, Macquarie University
| | - Imants Rubenis
- Concord Repatriation Hospital, Cardiology, University of Sydney
| | - Mark Butlin
- Faculty of Medicine, Health and Human Sciences, Macquarie University
| | - Ahmadreza Argha
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia
| | - Rajan Rehan
- Concord Repatriation Hospital, Cardiology, University of Sydney
| | - Alberto Avolio
- Faculty of Medicine, Health and Human Sciences, Macquarie University
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8
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Celler BG, Argha A. Measuring blood pressure from Korotkoff sounds as the brachial cuff inflates on average provides higher values than when the cuff deflates. Physiol Meas 2024; 45:055027. [PMID: 38565129 DOI: 10.1088/1361-6579/ad39a2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 04/02/2024] [Indexed: 04/04/2024]
Abstract
Objectives. In this study, we test the hypothesis that if, as demonstrated in a previous study, brachial arteries exhibit hysteresis as the occluding cuff is deflated and fail to open until cuff pressure (CP) is well below true intra-arterial blood pressure (IAPB), estimating systolic (SBP) and diastolic blood pressure (DBP) from the presence of Korotkoff sounds (KS) as CP increases may eliminate these errors and give more accurate estimates of SBP and DBP relative to IABP readings.Approach. In 62 subjects of varying ages (45.1 ± 19.8, range 20.6-75.8 years), including 44 men (45.3 ± 19.4, range 20.6-75.8 years) and 18 women (44.4 ± 21.4, range 20.9-75.3 years), we sequentially recorded SBP and DBP both during cuff inflation and cuff deflation using KS.Results. There was a significant (p< 0.0001) increase in SBP from 122.8 ± 13.2 to 127.6 ± 13.0 mmHg and a significant (p= 0.0001) increase in DBP from 70.0 ± 9.0 to 77.5 ± 9.7 mmHg. Of the 62 subjects, 51 showed a positive increase in SBP (0-14 mmHg) and 11 subjects showed a reduction (-0.3 to -7 mmHg). The average differences for SBP and DBP estimates derived as the cuff inflates and those derived as the cuff deflates were 4.8 ± 4.6 mmHg and 2.5 ± 4.6 mmHg, not dissimilar to the differences reported between IABP and non-invasive blood pressure measurements. Although we could not develop multiparameter linear or non-linear models to explain this phenomenon we have clearly demonstrated through ANOVA tests that both body mass index (BMI) and pulse wave velocity are implicated, supporting the hypothesis that the phenomenon is associated with age, higher BMI and stiffer arteries.Significance. The implications of this study are that brachial sphygmomanometry carried out during cuff inflation could be more accurate than measurements carried out as the cuff deflates. Further research is required to validate these results with IAPB measurements.
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Affiliation(s)
- Branko G Celler
- Biomedical Systems Research Laboratory in the School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Ahmadreza Argha
- Graduate School of Biomedical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
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9
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Kouz K, Thiele R, Michard F, Saugel B. Haemodynamic monitoring during noncardiac surgery: past, present, and future. J Clin Monit Comput 2024; 38:565-580. [PMID: 38687416 PMCID: PMC11164815 DOI: 10.1007/s10877-024-01161-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 04/02/2024] [Indexed: 05/02/2024]
Abstract
During surgery, various haemodynamic variables are monitored and optimised to maintain organ perfusion pressure and oxygen delivery - and to eventually improve outcomes. Important haemodynamic variables that provide an understanding of most pathophysiologic haemodynamic conditions during surgery include heart rate, arterial pressure, central venous pressure, pulse pressure variation/stroke volume variation, stroke volume, and cardiac output. A basic physiologic and pathophysiologic understanding of these haemodynamic variables and the corresponding monitoring methods is essential. We therefore revisit the pathophysiologic rationale for intraoperative monitoring of haemodynamic variables, describe the history, current use, and future technological developments of monitoring methods, and finally briefly summarise the evidence that haemodynamic management can improve patient-centred outcomes.
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Affiliation(s)
- Karim Kouz
- Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, Hamburg, 20246, Germany
- Outcomes Research Consortium, Cleveland, OH, USA
| | - Robert Thiele
- Department of Anesthesiology, University of Virginia, Charlottesville, VA, USA
| | | | - Bernd Saugel
- Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, Hamburg, 20246, Germany.
- Outcomes Research Consortium, Cleveland, OH, USA.
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10
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Celler BG, Yong A, Rubenis I, Butlin M, Argha A, Rehan R, Avolio A. Comparison of cuff inflation and cuff deflation brachial sphygmomanometry with intra-arterial blood pressure as reference. J Hypertens 2024; 42:968-976. [PMID: 38230615 DOI: 10.1097/hjh.0000000000003659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Conventional sphygmomanometry with cuff deflation is used to calibrate all noninvasive BP (NIBP) instruments and the International Standard makes no mention of calibrating methods specifically for NIBP instruments, which estimate systolic and diastolic pressure during cuff inflation rather than cuff deflation. There is however increasing interest in inflation-based NIBP (iNIBP) instruments on the basis of shorter measurement time, reduction in maximal inflation pressure and improvement in patient comfort and outcomes. However, we have previously demonstrated that SBP estimates based on the occurrence of the first K1 Korotkoff sounds during cuff deflation can underestimate intra-arterial SBP (IA-SBP) by an average of 14 ± 10 mmHg. In this study, we compare the dynamics of intra-arterial blood pressure (IABP) measurements with sequential measurement of Korotkoff sounds during both cuff inflation and cuff deflation in the same individual. In 40 individuals aged 64.1 ± 9.6 years (range 36-86 years), the overall dynamic responses below the cuff were similar, but the underestimation error was significantly larger during inflation than deflation, increasing from 14 ± 10 to 19 ± 12 mmHg ( P < 0.0001). No statistical models were found which could compensate for this error as were found for cuff deflation. The statistically significant BP differences between inflation and deflation protocols reported in this study suggest different behaviour of the arterial and venous vasculature between arterial opening and closing which warrant further investigation, particularly for iNIBP devices reporting estimates during cuff inflation. In addition, measuring Korotkoff sounds during cuff inflation represents significant technical difficulties because of increasing pump motor noise.
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Affiliation(s)
- Branko G Celler
- Biomedical Systems Research Laboratory, University of New South Wales
| | - Andy Yong
- Concord Repatriation Hospital, Cardiology, University of Sydney
- Faculty of Medicine, Health and Human Sciences, Macquarie University
| | - Imants Rubenis
- Concord Repatriation Hospital, Cardiology, University of Sydney
| | - Mark Butlin
- Faculty of Medicine, Health and Human Sciences, Macquarie University
| | - Ahmadreza Argha
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, New South Wales, Australia
| | - Rajan Rehan
- Concord Repatriation Hospital, Cardiology, University of Sydney
| | - Alberto Avolio
- Faculty of Medicine, Health and Human Sciences, Macquarie University
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11
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van Vliet M, Monnink SHJ, Kuiper MJ, Constandse JC, Hoftijzer D, Ronner E. Evaluation of a novel cuffless photoplethysmography-based wristband for measuring blood pressure according to the regulatory standards. EUROPEAN HEART JOURNAL. DIGITAL HEALTH 2024; 5:335-343. [PMID: 38774367 PMCID: PMC11104472 DOI: 10.1093/ehjdh/ztae006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/01/2023] [Accepted: 12/05/2023] [Indexed: 05/24/2024]
Abstract
Aims Elevated blood pressure (BP) is a key risk factor in cardiovascular diseases. However, obtaining reliable and reproducible BP remains a challenge. This study, therefore, aimed to evaluate a novel cuffless wristband, based on photoplethysmography (PPG), for continuous BP monitoring. Methods and results Predictions by a PPG-guided algorithm were compared to arterial BP measurements (in the sub-clavian artery), obtained during cardiac catheterization. Eligible patients were included and screened based on AAMI/European Society of Hypertension (ESH)/ISO Universal Standard requirements. The machine learning-based BP algorithm required three cuff-based initialization measurements in combination with ∼100 features (signal-derived and patient demographic-based). Ninety-seven patients and 420 samples were included. Mean age, weight, and height were 67.1 years (SD 11.1), 83.4 kg (SD 16.1), and 174 cm (SD 10), respectively. Systolic BP was ≤100 mmHg in 48 samples (11%) and ≥160 mmHg in 106 samples (25%). Diastolic BP was ≤70 mmHg in 222 samples (53%) and ≥85 mmHg in 99 samples (24%). The algorithm showed mean errors of ±3.7 mmHg (SD 4.4 mmHg) and ±2.5 mmHg (SD 3.7 mmHg) for systolic and diastolic BP, respectively. Similar results were observed across all genders and skin colours (Fitzpatrick I-VI). Conclusion This study provides initial evidence for the accuracy of a PPG-based BP algorithm in combination with a cuffless wristband across a range of BP distributions. This research complies with the AAMI/ESH/ISO Universal Standard, however, further research is required to evaluate the algorithms performance in light of the remaining European Society of Hypertension recommendations. Clinical trial registration www.clinicaltrials.gov, NCT05566886.
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Affiliation(s)
- Mariska van Vliet
- Department of Cardiology, Reinier de Graaf Hospital, Reinier de Graafweg 5, 2625 AD Delft, The Netherlands
| | - Stefan H J Monnink
- Department of Cardiology, Reinier de Graaf Hospital, Reinier de Graafweg 5, 2625 AD Delft, The Netherlands
| | - Mathijs J Kuiper
- Department of Cardiology, Reinier de Graaf Hospital, Reinier de Graafweg 5, 2625 AD Delft, The Netherlands
| | - Jan C Constandse
- Department of Cardiology, Reinier de Graaf Hospital, Reinier de Graafweg 5, 2625 AD Delft, The Netherlands
| | - Dieke Hoftijzer
- Department of Cardiology, Reinier de Graaf Hospital, Reinier de Graafweg 5, 2625 AD Delft, The Netherlands
| | - Eelko Ronner
- Department of Cardiology, Reinier de Graaf Hospital, Reinier de Graafweg 5, 2625 AD Delft, The Netherlands
- Corsano Health B.V., Wilhelmina van Pruisenweg 35, 2595 AN The Hague, The Netherlands
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12
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Celler BG, Yong A, Rubenis I, Butlin M, Argha A, Rehan R, Avolio A. Accurate detection of Korotkoff sounds reveals large discrepancy between intra-arterial systolic pressure and simultaneous noninvasive measurement of blood pressure with brachial cuff sphygmomanometry. J Hypertens 2024; 42:873-882. [PMID: 38230626 DOI: 10.1097/hjh.0000000000003651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Cardiovascular disease is the number 1 cause of death globally, with elevated blood pressure (BP) being the single largest risk factor. Hence, BP is an important physiological parameter used as an indicator of cardiovascular health. Noninvasive cuff-based automated monitoring is now the dominant method for BP measurement and irrespective of whether the oscillometric or the auscultatory method is used, all are calibrated according to the Universal Standard (ISO 81060-2:2019), which requires two trained operators to listen to Korotkoff K1 sounds for SBP and K4/K5 sounds for DBP. Hence, Korotkoff sounds are fundamental to the calibration of all NIBP devices. In this study of 40 lightly sedated patients, aged 64.1 ± 9.6 years, we compare SBP and DBP recorded directly by intra-arterial fluid filled catheters to values recorded from the onset (SBP-K) and cessation (DBP-K) of Korotkoff sounds. We demonstrate that whilst DBP-K measurements are in good agreement, with a mean difference of -0.3 ± 5.2 mmHg, SBP-K underestimates true intra-arterial SBP (IA-SBP) by an average of 14 ± 9.6 mmHg. The underestimation arises from delays in the re-opening of the brachial artery following deflation of the brachial cuff to below SBP. The reasons for this delay are not known but appear related to the difference between SBP and the pressure under the cuff as blood first begins to flow, as the cuff deflates. Linear models are presented that can correct the underestimation in SBP resulting in estimates with a mean difference of 0.2 ± 7.1 mmHg with respect to intra-arterial SBP.
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Affiliation(s)
- Branko G Celler
- Biomedical Systems Research Laboratory, University of New South Wales
| | - Andy Yong
- Concord Repatriation Hospital, Cardiology, University of Sydney
- Faculty of Medicine, Health and Human Sciences, Macquarie University
| | - Imants Rubenis
- Concord Repatriation Hospital, Cardiology, University of Sydney
| | - Mark Butlin
- Faculty of Medicine, Health and Human Sciences, Macquarie University
| | - Ahmadreza Argha
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia
| | - Rajan Rehan
- Concord Repatriation Hospital, Cardiology, University of Sydney
| | - Alberto Avolio
- Faculty of Medicine, Health and Human Sciences, Macquarie University
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13
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Irimpan J, Kesavan R, Rajan S, Kumar L. Comparison of intraoperative blood pressure values measured by noninvasive versus invasive methods during normotension, hypertension, and hypotension. J Anaesthesiol Clin Pharmacol 2024; 40:258-263. [PMID: 38919432 PMCID: PMC11196061 DOI: 10.4103/joacp.joacp_439_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 07/13/2023] [Accepted: 07/16/2023] [Indexed: 06/27/2024] Open
Abstract
Background and Aims Monitoring of intraoperative blood pressure (BP) is essential. We aimed to compare BP values simultaneously recorded by invasive and noninvasive methods under general anesthesia (GA) during normotension, hypertension, and hypotension. Mean arterial pressure (MAP) values calculated by the automated technique were also compared to the values obtained using predefined formula. Material and Methods An observational, prospective study was conducted in 250 adult patients undergoing elective surgeries under GA. Before induction, noninvasive blood pressure (NIBP) was measured in the arm in a supine position using an automated oscillometer. Radial artery in the opposite arm was cannulated. NIBP and arterial BP (ABP) were recorded simultaneously during normotension, hypotension, and hypertension. Results During normotension and hypertension, systolic BP (SBP) measured by NIBP and ABP were comparable. Diastolic BP (DBP) and MAP during normotension were significantly higher with NIBP (73.65 ± 7.73 vs. 65.69 ± 8.39 and 87.79 ± 8.43 vs. 84.24 ± 8.82, respectively). During hypertension, DBP and MAP were significantly higher with NIBP (90.44 ± 11.61 vs. 78.59 ± 11.09 and 111.67 ± 10.43 vs. 105.63 ± 11.06, respectively). During hypotension, SBP was significantly higher in ABP (91.14 ± 6.90 vs. 86.24 ± 6.06), and DBP and MAP were comparable. Comparison of MAP measured by ABP and NIBP techniques with the MAP calculated using predefined formula in normotension showed significantly higher values with the automated technique. Conclusions During normotension and hypertension, DBP and MAP showed significantly higher values with the NIBP technique compared to ABP, with comparable SBP values. During hypotension, SBP showed significantly higher values with the ABP technique, with comparable DBP and MAP. MAP obtained using predefined formula and automated method in normotension was significantly higher with the automated technique.
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Affiliation(s)
- Joel Irimpan
- Department of Anaesthesiology, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - Rajesh Kesavan
- Department of Anaesthesiology, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - Sunil Rajan
- Department of Anaesthesiology, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - Lakshmi Kumar
- Department of Anaesthesiology, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
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14
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Zhang X, Wang Y, Yin Z, Liang F. Optimization and validation of a suprasystolic brachial cuff-based method for noninvasively estimating central aortic blood pressure. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2024; 40:e3806. [PMID: 38281742 DOI: 10.1002/cnm.3806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/12/2023] [Accepted: 01/14/2024] [Indexed: 01/30/2024]
Abstract
Clinical studies have extensively demonstrated that central aortic blood pressure (CABP) has greater clinical significance in comparison with peripheral blood pressure. Despite the existence of various techniques for noninvasively measuring CABP, the clinical applications of most techniques are hampered by the unsatisfactory accuracy or large variability in measurement errors. In this study, we proposed a new method for noninvasively estimating CABP with improved accuracy and reduced uncertain errors. The main idea was to optimize the estimation of the pulse wave transit time from the aorta to the occluded lumen of the brachial artery under a suprasystolic cuff by identifying and utilizing the characteristic information of the cuff oscillation wave, thereby improving the accuracy and stability of the CABP estimation algorithms under various physiological conditions. The method was firstly developed and verified based on large-scale virtual subject data (n = 800) generated by a computational model of the cardiovascular system coupled to a brachial cuff, and then validated with small-scale in vivo data (n = 34). The estimation errors for the aortic systolic pressure were -0.05 ± 0.63 mmHg in the test group of the virtual subjects and -1.09 ± 3.70 mmHg in the test group of the patients, both demonstrating a good performance. In particular, the estimation errors were found to be insensitive to variations in hemodynamic conditions and cardiovascular properties, manifesting the high robustness of the method. The method may have promising clinical applicability, although further validation studies with larger-scale clinical data remain necessary.
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Affiliation(s)
- Xujie Zhang
- Department of Engineering Mechanics, School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yue Wang
- Department of Cardiology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhaofang Yin
- Department of Cardiology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fuyou Liang
- Department of Engineering Mechanics, School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai, China
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15
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Saugel B, Annecke T, Bein B, Flick M, Goepfert M, Gruenewald M, Habicher M, Jungwirth B, Koch T, Kouz K, Meidert AS, Pestel G, Renner J, Sakka SG, Sander M, Treskatsch S, Zitzmann A, Reuter DA. Intraoperative haemodynamic monitoring and management of adults having non-cardiac surgery: Guidelines of the German Society of Anaesthesiology and Intensive Care Medicine in collaboration with the German Association of the Scientific Medical Societies. J Clin Monit Comput 2024:10.1007/s10877-024-01132-7. [PMID: 38381359 DOI: 10.1007/s10877-024-01132-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 01/25/2024] [Indexed: 02/22/2024]
Abstract
Haemodynamic monitoring and management are cornerstones of perioperative care. The goal of haemodynamic management is to maintain organ function by ensuring adequate perfusion pressure, blood flow, and oxygen delivery. We here present guidelines on "Intraoperative haemodynamic monitoring and management of adults having non-cardiac surgery" that were prepared by 18 experts on behalf of the German Society of Anaesthesiology and Intensive Care Medicine (Deutsche Gesellschaft für Anästhesiologie und lntensivmedizin; DGAI).
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Affiliation(s)
- Bernd Saugel
- Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
- Outcomes Research Consortium, Cleveland, OH, USA.
| | - Thorsten Annecke
- Department of Anesthesiology and Intensive Care Medicine, Cologne Merheim Medical Center, Hospital of the University of Witten/Herdecke, Cologne, Germany
| | - Berthold Bein
- Department for Anaesthesiology, Asklepios Hospital Hamburg St. Georg, Hamburg, Germany
| | - Moritz Flick
- Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Matthias Goepfert
- Department of Anaesthesiology and Intensive Care Medicine, Alexianer St. Hedwigkliniken Berlin, Berlin, Germany
| | - Matthias Gruenewald
- Department of Anaesthesiology and Intensive Care Medicine, Evangelisches Amalie Sieveking Krankenhaus, Hamburg, Germany
| | - Marit Habicher
- Department of Anaesthesiology, Intensive Care Medicine and Pain Medicine, University Hospital Giessen, Justus-Liebig University Giessen, Giessen, Germany
| | - Bettina Jungwirth
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Ulm, Ulm, Germany
| | - Tilo Koch
- Department of Anesthesiology and Intensive Care, Philipps-University Marburg, Marburg, Germany
| | - Karim Kouz
- Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Outcomes Research Consortium, Cleveland, OH, USA
| | - Agnes S Meidert
- Department of Anaesthesiology, University Hospital LMU Munich, Munich, Germany
| | - Gunther Pestel
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University, Mainz, Germany
| | - Jochen Renner
- Department of Anesthesiology and Intensive Care Medicine, Municipal Hospital Kiel, Kiel, Germany
| | - Samir G Sakka
- Department of Intensive Care Medicine, Gemeinschaftsklinikum Mittelrhein gGmbH, Academic Teaching Hospital of the Johannes Gutenberg University Mainz, Koblenz, Germany
| | - Michael Sander
- Department of Anaesthesiology, Intensive Care Medicine and Pain Medicine, University Hospital Giessen, Justus-Liebig University Giessen, Giessen, Germany
| | - Sascha Treskatsch
- Department of Anesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, Charité Campus Benjamin Franklin, Berlin, Germany
| | - Amelie Zitzmann
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre of Rostock, Rostock, Germany
| | - Daniel A Reuter
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Medical Centre of Rostock, Rostock, Germany
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16
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Bui TV, Sharman JE, Mynard JP, Ayer JG, Goupil R, Picone DS. Influence of Age on Upper Arm Cuff Blood Pressure Measurement Across the Lifespan. J Am Heart Assoc 2024; 13:e031389. [PMID: 38293933 PMCID: PMC11056138 DOI: 10.1161/jaha.123.031389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 01/09/2024] [Indexed: 02/01/2024]
Affiliation(s)
- Tan V. Bui
- Menzies Institute for Medical Research, University of TasmaniaHobartTasmaniaAustralia
| | - James E. Sharman
- Menzies Institute for Medical Research, University of TasmaniaHobartTasmaniaAustralia
| | - Jonathan P. Mynard
- Heart ResearchMurdoch Children’s Research InstituteParkvilleVictoriaAustralia
- Department of Paediatrics and Biomedical EngineeringUniversity of MelbourneParkvilleVictoriaAustralia
| | - Julian G. Ayer
- The Heart Centre for ChildrenThe Children’s Hospital at WestmeadSydneyNew South WalesAustralia
- Sydney Medical School, Faculty of Medicine and HealthUniversity of SydneySydneyNew South WalesAustralia
| | - Remi Goupil
- Hopital du Sacre‐Coeur de MontrealUniversite de MontrealMontrealQuebecCanada
| | - Dean S. Picone
- Menzies Institute for Medical Research, University of TasmaniaHobartTasmaniaAustralia
- School of Health Sciences, Faculty of Medicine and HealthUniversity of SydneySydneyNew South WalesAustralia
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17
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Feitosa ADDM, Barroso WKS, Mion Junior D, Nobre F, Mota-Gomes MA, Jardim PCBV, Amodeo C, Oliveira AC, Alessi A, Sousa ALL, Brandão AA, Pio-Abreu A, Sposito AC, Pierin AMG, Paiva AMGD, Spinelli ACDS, Machado CA, Poli-de-Figueiredo CE, Rodrigues CIS, Forjaz CLDM, Sampaio DPS, Barbosa ECD, Freitas EVD, Cestario EDES, Muxfeldt ES, Lima Júnior E, Campana EMG, Feitosa FGAM, Consolim-Colombo FM, Almeida FAD, Silva GVD, Moreno Júnior H, Finimundi HC, Guimarães ICB, Gemelli JR, Barreto-Filho JAS, Vilela-Martin JF, Ribeiro JM, Yugar-Toledo JC, Magalhães LBNC, Drager LF, Bortolotto LA, Alves MADM, Malachias MVB, Neves MFT, Santos MC, Dinamarco N, Moreira Filho O, Passarelli Júnior O, Vitorino PVDO, Miranda RD, Bezerra R, Pedrosa RP, Paula RBD, Okawa RTP, Póvoa RMDS, Fuchs SC, Lima SGD, Inuzuka S, Ferreira-Filho SR, Fillho SHDP, Jardim TDSV, Guimarães Neto VDS, Koch VHK, Gusmão WDP, Oigman W, Nadruz Junior W. Brazilian Guidelines for In-office and Out-of-office Blood Pressure Measurement - 2023. Arq Bras Cardiol 2024; 121:e20240113. [PMID: 38695411 DOI: 10.36660/abc.20240113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2024] Open
Affiliation(s)
- Audes Diogenes de Magalhães Feitosa
- Universidade Federal de Pernambuco (UFPE), Recife, PE - Brasil
- Pronto Socorro Cardiológico de Pernambuco (PROCAPE), Recife, PE - Brasil
- Instituto de Assistência, Pesquisa e Ensino em Saúde (IAPES), Recife, PE - Brasil
| | | | - Decio Mion Junior
- Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo, SP - Brasil
| | - Fernando Nobre
- Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo, Ribeirão Preto, SP - Brasil
| | - Marco Antonio Mota-Gomes
- Centro Universitário CESMAC, Maceió, AL - Brasil
- Hospital do Coração de Alagoas, Maceió, AL - Brasil
- Centro de Pesquisas Clínicas Dr. Marco Mota, Maceió, AL - Brasil
| | | | - Celso Amodeo
- Hcor, Associação Beneficente Síria, São Paulo, SP - Brasil
| | | | | | - Ana Luiza Lima Sousa
- Faculdade de Enfermagem da Universidade Federal de Goiás (UFG), Goiânia, GO - Brasil
| | | | - Andrea Pio-Abreu
- Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo, SP - Brasil
| | - Andrei C Sposito
- Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo - Brasil
| | | | | | | | | | | | - Cibele Isaac Saad Rodrigues
- Pontifícia Universidade Católica de São Paulo, Faculdade de Ciências Médicas e da Saúde,Sorocaba, SP - Brasil
| | | | | | | | | | | | - Elizabeth Silaid Muxfeldt
- Universidade Federal do Rio de Janeiro (UFRJ), Hospital Universitário Clementino Fraga Filho - Programa de Hipertensão Arterial Resistente (ProHArt), Rio de Janeiro, RJ - Brasil
- Instituto de Educação Médica (IDOMED) - Universidade Estácio de Sá, Rio de Janeiro, RJ - Brasil
| | | | | | - Fabiana Gomes Aragão Magalhães Feitosa
- Universidade Federal de Pernambuco (UFPE), Recife, PE - Brasil
- Pronto Socorro Cardiológico de Pernambuco (PROCAPE), Recife, PE - Brasil
- Instituto de Medicina Integral Prof. Fernando Figueira (IMIP), Recife, PE - Brasil
| | | | - Fernando Antônio de Almeida
- Pontifícia Universidade Católica de São Paulo, Faculdade de Ciências Médicas e da Saúde,Sorocaba, SP - Brasil
| | - Giovanio Vieira da Silva
- Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo, SP - Brasil
| | | | | | | | | | | | | | - José Marcio Ribeiro
- Faculdade Ciências Médicas de Minas Gerais, Belo Horizonte, MG - Brasil
- Hospital Felício Rocho, Belo Horizonte, MG - Brasil
| | | | | | - Luciano F Drager
- Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo, SP - Brasil
| | - Luiz Aparecido Bortolotto
- Instituto do Coração da Faculdade de Medicina da Universidade de São Paulo (Incor/FMUSP), São Paulo, SP - Brasil
| | | | - Marcus Vinícius Bolívar Malachias
- Faculdade Ciências Médicas de Minas Gerais, Belo Horizonte, MG - Brasil
- Fundação Educacional Lucas Machado (FELUMA), Belo Horizonte, MG - Brasil
| | | | - Mayara Cedrim Santos
- Universidade Federal de Pernambuco (UFPE), Recife, PE - Brasil
- Instituto de Assistência, Pesquisa e Ensino em Saúde (IAPES), Recife, PE - Brasil
| | - Nelson Dinamarco
- Colegiado de Medicina - Universidade Estadual de Santa Cruz (UESC), Ilhéus, BA - Brasil
| | | | | | | | | | - Rodrigo Bezerra
- Pronto Socorro Cardiológico de Pernambuco (PROCAPE), Recife, PE - Brasil
- Laboratório de Imunopatologia Keizo Asami da Universidade Federal de Pernambuco, Recife, PE - Brasil
| | | | | | | | | | - Sandra C Fuchs
- Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS - Brasil
| | | | - Sayuri Inuzuka
- Unidade de Hipertensão Arterial - NIPEE - LHA/UFG, Goiânia, GO - Brasil
| | | | | | | | | | - Vera Hermina Kalika Koch
- Instituto da Criança e do adolescente do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), São Paulo, SP - Brasil
| | - Waléria Dantas Pereira Gusmão
- Centro Universitário CESMAC, Maceió, AL - Brasil
- Universidade Estadual de Ciências da Saúde de Alagoas (UNCISAL), Maceió, AL - Brasil
| | - Wille Oigman
- Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ - Brasil
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18
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Lundwall K, Kahan T, Omboni S. Blood pressure in atrial fibrillation and in sinus rhythm during ambulatory blood pressure monitoring: data from the TEMPLAR project. Hypertens Res 2024; 47:435-444. [PMID: 37872374 PMCID: PMC10838766 DOI: 10.1038/s41440-023-01473-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 09/04/2023] [Accepted: 09/28/2023] [Indexed: 10/25/2023]
Abstract
The coexistence of hypertension and atrial fibrillation (AF) is common and accounts for a worse prognosis. Uncertainties exist regarding blood pressure (BP) measurements in AF patients by automated oscillometric devices. The Microlife WatchBP 03 AFIB ambulatory BP monitoring (ABPM) device including an AF algorithm with each measurement was used in 430 subjects aged >65 years referred for ABPM and with assumed paroxysmal AF to perform intra-individual comparisons of BP during both AF-indicated and sinus rhythm. Only subjects with >30% of measurements indicating AF and episodes >30 min for assumed AF and for sinus rhythm were included. Mean age was 78 ± 7 years, 43% were male, 77% hypertensive, and 72% were treated. Compared to sinus rhythm, 24-h mean arterial pressure was similar (87.2 ± 9.5 vs 87.5 ± 10.6 mm Hg, p = 0.47), whereas 24-h systolic BP tended to be lower (123.6 ± 13.9 vs 124.7 ± 16.1 mm Hg, p = 0.05) and night-time diastolic BP higher (64.6 ± 10.9 vs 63.3 ± 10.4 mm Hg, p = 0.01) in assumed AF. Diastolic (not systolic) BP variability was higher in AF (p < 0.001). Results were similar with heart rates <90 and ≥90 bpm. In conclusion, this is the first study to use intra-individual comparisons of averaged BP during an ABPM in assumed paroxysmal AF and sinus rhythm. Our results imply that ABPM is feasible and informative also in patients with AF. We also suggest that an AF detection algorithm offers a new approach to evaluate the reliability of averaged BP values in AF compared to SR during an ABPM.
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Affiliation(s)
- Kristina Lundwall
- Division of Cardiovascular Medicine, Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden.
| | - Thomas Kahan
- Division of Cardiovascular Medicine, Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Stefano Omboni
- Clinical Research Unit, Italian Institute of Telemedicine, Varese, Italy
- Department of Cardiology, Sechenov First Moscow State Medical University, Moscow, Russian Federation
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19
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Kim J, Chang SA, Park SW. First-in-Human Study for Evaluating the Accuracy of Smart Ring Based Cuffless Blood Pressure Measurement. J Korean Med Sci 2024; 39:e18. [PMID: 38225785 PMCID: PMC10789523 DOI: 10.3346/jkms.2024.39.e18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 10/17/2023] [Indexed: 01/17/2024] Open
Abstract
BACKGROUND Recently, a ring-type cuffless blood pressure (BP) measuring device has been developed. This study was a prospective, single arm, first-in-human pivotal trial to evaluate accuracy of BP measurement by the new device. METHODS The ring-type smart wearable monitoring device measures photoplethysmography signals from the proximal phalanx and transmits the data wirelessly to a connected smartphone. For the BP comparison, a cuff was worn on the arm to check the reference BP by auscultatory method, while the test device was worn on the finger of the opposite arm to measure BP simultaneously. Measurements were repeated for up to three sets each on the left and right arms. The primary outcome measure was mean difference and standard deviation of BP differences between the test device and the reference readings. RESULTS We obtained 526 sets of systolic BP (SBP) and 513 sets of diastolic BP (DBP) from 89 subjects, with ranges of 80 to 175 mmHg and 43 to 122 mmHg for SBP and DBP, respectively. In sample-wise comparison, the mean difference between the test device and the reference was 0.16 ± 5.90 mmHg (95% limits of agreement [LOA], -11.41, 11.72) in SBP and -0.07 ± 4.68 (95% LOA, -9.26, 9.10) in DBP. The test device showed a strong correlation with the reference for SBP (r = 0.94, P < 0.001) and DBP (r = 0.95, P < 0.001). There were consistent results in subject-wise comparison. CONCLUSION The new ring-type BP measuring device showed a good correlation for SBP and DBP with minimal bias compared with an auscultatory method.
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Affiliation(s)
- Jihoon Kim
- Division of Cardiology, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sung-A Chang
- Division of Cardiology, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seung Woo Park
- Division of Cardiology, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
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20
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Kim B, Zhao W, Tang SY, Levin MG, Ibrahim A, Yang Y, Roberts E, Lai L, Li J, Assoian RK, FitzGerald GA, Arany Z. Endothelial lipid droplets suppress eNOS to link high fat consumption to blood pressure elevation. J Clin Invest 2023; 133:e173160. [PMID: 37824206 PMCID: PMC10721151 DOI: 10.1172/jci173160] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 10/10/2023] [Indexed: 10/14/2023] Open
Abstract
Metabolic syndrome, today affecting more than 20% of the US population, is a group of 5 conditions that often coexist and that strongly predispose to cardiovascular disease. How these conditions are linked mechanistically remains unclear, especially two of these: obesity and elevated blood pressure. Here, we show that high fat consumption in mice leads to the accumulation of lipid droplets in endothelial cells throughout the organism and that lipid droplet accumulation in endothelium suppresses endothelial nitric oxide synthase (eNOS), reduces NO production, elevates blood pressure, and accelerates atherosclerosis. Mechanistically, the accumulation of lipid droplets destabilizes eNOS mRNA and activates an endothelial inflammatory signaling cascade that suppresses eNOS and NO production. Pharmacological prevention of lipid droplet formation reverses the suppression of NO production in cell culture and in vivo and blunts blood pressure elevation in response to a high-fat diet. These results highlight lipid droplets as a critical and unappreciated component of endothelial cell biology, explain how lipids increase blood pressure acutely, and provide a mechanistic account for the epidemiological link between obesity and elevated blood pressure.
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Affiliation(s)
- Boa Kim
- Department of Pathology and Lab Medicine, McAllister Heart Institute, Nutrition Obesity Research Center, and Lineberger Cancer Center, University of North Carolina, Chapel Hill, North Carolina, USA
- Department of Medicine, Cardiovascular Institute, and Institute of Diabetes Obesity and Metabolism, Perelman School of Medicine
| | - Wencao Zhao
- Department of Medicine, Cardiovascular Institute, and Institute of Diabetes Obesity and Metabolism, Perelman School of Medicine
| | - Soon Y. Tang
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, and
| | - Michael G. Levin
- Department of Medicine, Cardiovascular Institute, and Institute of Diabetes Obesity and Metabolism, Perelman School of Medicine
| | - Ayon Ibrahim
- Department of Medicine, Cardiovascular Institute, and Institute of Diabetes Obesity and Metabolism, Perelman School of Medicine
| | - Yifan Yang
- Department of Medicine, Cardiovascular Institute, and Institute of Diabetes Obesity and Metabolism, Perelman School of Medicine
| | - Emilia Roberts
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, and
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Ling Lai
- Department of Medicine, Cardiovascular Institute, and Institute of Diabetes Obesity and Metabolism, Perelman School of Medicine
| | - Jian Li
- Department of Medicine, Cardiovascular Institute, and Institute of Diabetes Obesity and Metabolism, Perelman School of Medicine
| | - Richard K. Assoian
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, and
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Garret A. FitzGerald
- Department of Medicine, Cardiovascular Institute, and Institute of Diabetes Obesity and Metabolism, Perelman School of Medicine
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, and
| | - Zoltan Arany
- Department of Medicine, Cardiovascular Institute, and Institute of Diabetes Obesity and Metabolism, Perelman School of Medicine
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21
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Catinis AM, Hinojosa AJ, Leonardi C, Cook MW. Hepatic Vagotomy in Patients With Obesity Leads to Improvement of the Cholesterol to High-Density Lipoprotein Ratio. Obes Surg 2023; 33:3740-3745. [PMID: 37924466 DOI: 10.1007/s11695-023-06800-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 08/13/2023] [Accepted: 08/18/2023] [Indexed: 11/06/2023]
Abstract
INTRODUCTION/PURPOSE The obesity epidemic is rapidly growing, and visceral adiposity is associated with metabolic consequences secondary to peroxisome proliferator-activated receptor (PPAR)-induced inter-organ signaling pathways. PPARs are ligand-activated transcription factors that modulate vagal pathways which can improve blood pressure, arterial remodeling, cholesterol levels, and insulin sensitivity. However, an obesity-induced inflammatory milieu can interfere with the beneficial effects of PPAR activity, suggesting that a dysregulated PPAR-vagus pathway may play a role in the pathogenesis of obesity-related hypertension. Therefore, we hypothesized that hepatic vagotomy (HV) in patients with obesity would result in a significant reduction in blood pressure and/or the number of hypertension medications compared to control. METHODS We conducted a retrospective chart review of 160 patients undergoing laparoscopic sleeve gastrectomy. Patients were divided into HV and control groups, and information was collected at each clinic visit. RESULTS At six-months post-operation, the HV group was found to have significantly lower total cholesterol (TC)/high-density lipoprotein (HDL) ratios than the control group. The HV group also had a numerically better blood profile for TC, HDL, low-density lipoprotein (LDL), triglycerides, C-reactive protein, and LDL/HDL ratio. Hypertensive patients in the HV group showed numerically lower hypertension medication counts after six weeks when compared to control. CONCLUSION We present the first study to report clinically significant changes related to HV in human subjects. Our results did not support our initial hypothesis but did demonstrate an improvement of the TC/HDL ratio with HV in patients with obesity. Future studies should confirm these findings in a randomized control trial.
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Affiliation(s)
- Anna M Catinis
- LSUHSC School of Medicine, 433 Bolivar St, New Orleans, LA, 70112, USA
| | - Ashlin J Hinojosa
- LSUHSC School of Medicine, 433 Bolivar St, New Orleans, LA, 70112, USA
| | - Claudia Leonardi
- LSUHSC School of Public Health, 2020 Gravier St, New Orleans, LA, 70112, USA
| | - Michael W Cook
- LSU Department of Surgery, School of Medicine, 433 Bolivar St, New Orleans, LA, 70112, USA.
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22
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Warren J, Dinh D, Brennan A, Tan C, Dagan M, Stehli J, Clark DJ, Ajani AE, Reid CM, Sebastian M, Oqueli E, Freeman M, Stub D, Duffy SJ. Impact of Preprocedural Diastolic Blood Pressure on Outcomes in Patients Undergoing Percutaneous Coronary Intervention. Hypertension 2023; 80:2447-2454. [PMID: 37655489 DOI: 10.1161/hypertensionaha.123.20963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 08/15/2023] [Indexed: 09/02/2023]
Abstract
BACKGROUND Recent US guidelines recommend lower blood pressure (BP) targets in hypertension, but aggressive lowering of diastolic BP (DBP) can occur at the expense of myocardial perfusion, particularly in the presence of coronary artery disease. We sought to establish the long-term impact of low DBP on mortality among patients undergoing percutaneous coronary intervention with well-controlled systolic BP. METHODS We analyzed data from 12 965 patients undergoing percutaneous coronary intervention between 2009 and 2018 from the Melbourne Interventional Group registry who had a preprocedural systolic BP of ≤140 mm Hg. Patients with ST-elevation myocardial infarction, cardiogenic shock, and out-of-hospital arrest were excluded. Patients were stratified into 5 groups according to preprocedural DBP: <50, 50 to 59, 60 to 69, 70 to 79, and ≥80 mm Hg. The primary outcome was long-term, all-cause mortality. Mortality data were derived from the Australian National Death Index. RESULTS Patients with DBP<50 mm Hg were older with higher rates of diabetes, renal impairment, prior myocardial infarction, left ventricular dysfunction, peripheral and cerebrovascular disease (all P<0.001). Patients with DBP<50 mm Hg had higher 30-day (2.5% versus 0.7% for the other 4 quintiles; P<0.0001) and long-term mortality (median, 3.6 years; follow-up, 29% versus 11%; P<0.0001). Cox-regression analysis revealed that DBP<50 mm Hg was an independent predictor of long-term mortality (hazard ratio [HR], 1.55 [95% CI, 1.20-2.00]; P=0.001). CONCLUSIONS In patients with well-controlled systolic BP undergoing percutaneous coronary intervention, low DBP (<50 mm Hg) is an independent predictor of long-term mortality.
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Affiliation(s)
- Josephine Warren
- Department of Cardiology, Alfred Hospital, Melbourne, Australia (J.W., C.T., M.D., J.S., D.S.)
| | - Diem Dinh
- Centre of Cardiovascular Research and Education in Therapeutics, Monash University, Melbourne, Australia (D.D., A.B., C.M.R., D.S., S.J.D.)
| | - Angela Brennan
- Centre of Cardiovascular Research and Education in Therapeutics, Monash University, Melbourne, Australia (D.D., A.B., C.M.R., D.S., S.J.D.)
| | - Christianne Tan
- Department of Cardiology, Alfred Hospital, Melbourne, Australia (J.W., C.T., M.D., J.S., D.S.)
| | - Misha Dagan
- Department of Cardiology, Alfred Hospital, Melbourne, Australia (J.W., C.T., M.D., J.S., D.S.)
| | - Julia Stehli
- Department of Cardiology, Alfred Hospital, Melbourne, Australia (J.W., C.T., M.D., J.S., D.S.)
- University Hospital, Zurich, Switzerland (J.S.)
| | - David J Clark
- Department of Cardiology, Austin Hospital, Melbourne, Australia (D.J.C.)
| | - Andrew E Ajani
- Department of Cardiology, Royal Melbourne Hospital, Melbourne, Australia (A.E.A.)
| | - Christopher M Reid
- Centre of Cardiovascular Research and Education in Therapeutics, Monash University, Melbourne, Australia (D.D., A.B., C.M.R., D.S., S.J.D.)
| | - Martin Sebastian
- Department of Cardiology, Barwon Health, Geelong, Australia (M.S.)
| | - Ernesto Oqueli
- Department of Cardiology, Grampians Health Ballarat, Australia (E.O.)
- School of Medicine, Faculty of Health, Deakin University, Geelong, VIC, Australia (E.O.)
| | - Melanie Freeman
- Department of Cardiology, Box Hill Hospital, Melbourne, Australia (M.F.)
| | - Dion Stub
- Department of Cardiology, Alfred Hospital, Melbourne, Australia (J.W., C.T., M.D., J.S., D.S.)
- Centre of Cardiovascular Research and Education in Therapeutics, Monash University, Melbourne, Australia (D.D., A.B., C.M.R., D.S., S.J.D.)
| | - Stephen J Duffy
- Centre of Cardiovascular Research and Education in Therapeutics, Monash University, Melbourne, Australia (D.D., A.B., C.M.R., D.S., S.J.D.)
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23
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Baranger J, Villemain O, Goudot G, Dizeux A, Le Blay H, Mirault T, Messas E, Pernot M, Tanter M. The fundamental mechanisms of the Korotkoff sounds generation. SCIENCE ADVANCES 2023; 9:eadi4252. [PMID: 37792931 PMCID: PMC10550233 DOI: 10.1126/sciadv.adi4252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 09/05/2023] [Indexed: 10/06/2023]
Abstract
Blood pressure measurement is the most widely performed clinical exam to predict mortality risk. The gold standard for its noninvasive assessment is the auscultatory method, which relies on listening to the so-called "Korotkoff sounds" in a stethoscope placed at the outlet of a pneumatic arm cuff. However, more than a century after their discovery, the origin of these sounds is still debated, which implies a number of clinical limitations. We imaged the Korotkoff sound generation in vivo at thousands of images per second using ultrafast ultrasound. We showed with both experience and theory that Korotkoff sounds are paradoxically not sound waves emerging from the brachial artery but rather shear vibrations conveyed in surrounding tissues by the nonlinear pulse wave propagation. When these shear vibrations reached the stethoscope, they were synchronous, correlated, and comparable in intensity with the Korotkoff sounds. Understanding this mechanism could ultimately improve blood pressure measurement and provide additional understanding of arterial mechanical properties.
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Affiliation(s)
- Jerome Baranger
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
| | - Olivier Villemain
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
| | - Guillaume Goudot
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
- Université Paris Cité, Inserm UMR 970, PARCC, Vascular Medicine Department, Hôpital Européen Georges-Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Alexandre Dizeux
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
| | - Heiva Le Blay
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
| | - Tristan Mirault
- Université Paris Cité, Inserm UMR 970, PARCC, Vascular Medicine Department, Hôpital Européen Georges-Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Emmanuel Messas
- Université Paris Cité, Inserm UMR 970, PARCC, Vascular Medicine Department, Hôpital Européen Georges-Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Mathieu Pernot
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
| | - Mickael Tanter
- Physics for Medicine Paris, Inserm, ESPCI PSL Paris, CNRS, Paris, France
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24
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Fonseca R, Palmer AJ, Picone DS, Cox IA, Schultz MG, Black JA, Bos WJW, Cheng HM, Chen CH, Cremer A, Dwyer N, Hughes AD, Lacy P, Omboni S, Ott C, Pereira T, Pucci G, Schmieder R, Wang JG, Weber T, Westerhof BE, Williams B, Sharman JE. Cardiovascular and health cost impacts of cuff blood pressure underestimation and overestimation of invasive aortic systolic blood pressure. J Hypertens 2023; 41:1585-1594. [PMID: 37466429 PMCID: PMC7614996 DOI: 10.1097/hjh.0000000000003510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
OBJECTIVE Hypertension management is directed by cuff blood pressure (BP), but this may be inaccurate, potentially influencing cardiovascular disease (CVD) events and health costs. This study aimed to determine the impact on CVD events and related costs of the differences between cuff and invasive SBP. METHODS Microsimulations based on Markov modelling over one year were used to determine the differences in the number of CVD events (myocardial infarction or coronary death, stroke, atrial fibrillation or heart failure) predicted by Framingham risk and total CVD health costs based on cuff SBP compared with invasive (aortic) SBP. Modelling was based on international consortium data from 1678 participants undergoing cardiac catheterization and 30 separate studies. Cuff underestimation and overestimation were defined as cuff SBP less than invasive SBP and cuff SBP greater than invasive SBP, respectively. RESULTS The proportion of people with cuff SBP underestimation versus overestimation progressively increased as SBP increased. This reached a maximum ratio of 16 : 1 in people with hypertension grades II and III. Both the number of CVD events missed (predominantly stroke, coronary death and myocardial infarction) and associated health costs increased stepwise across levels of SBP control, as cuff SBP underestimation increased. The maximum number of CVD events potentially missed (11.8/1000 patients) and highest costs ($241 300 USD/1000 patients) were seen in people with hypertension grades II and III and with at least 15 mmHg of cuff SBP underestimation. CONCLUSION Cuff SBP underestimation can result in potentially preventable CVD events being missed and major increases in health costs. These issues could be remedied with improved cuff SBP accuracy.
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Affiliation(s)
- Ricardo Fonseca
- Menzies Institute for Medical Research, University of Tasmania
| | - Andrew J Palmer
- Menzies Institute for Medical Research, University of Tasmania
| | - Dean S Picone
- Menzies Institute for Medical Research, University of Tasmania
| | - Ingrid A Cox
- Menzies Institute for Medical Research, University of Tasmania
| | | | - J Andrew Black
- Menzies Institute for Medical Research, University of Tasmania
- Royal Hobart Hospital, Hobart, Australia
| | - Willem J W Bos
- St Antonius Hospital, Department of Internal Medicine, Nieuwegein
- Department of Internal Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Hao-Min Cheng
- Department of Medicine
- Institute of Public Health, National Yang Ming Chiao Tung University College of Medicine
- Center for Evidence-based Medicine
- Department of Medical Education, Taipei Veterans General Hospital
- Institute of Health and Welfare Policy, National Yang Ming Chiao Tung University College of Medicine, Taipei, Taiwan
| | | | - Antoine Cremer
- Department of Cardiology/Hypertension, University Hospital of Bordeaux, Bordeaux, France
| | | | - Alun D Hughes
- MRC Unit for Lifelong Health and Ageing at UCL, Institute of Cardiovascular Sciences, University College London
| | - Peter Lacy
- Institute of Cardiovascular Sciences University College London (UCL) and National Institute for Health Research (NIHR) UCL/UCL Hospitals Biomedical Research Centre, London, United Kingdom
| | - Stefano Omboni
- Clinical Research Unit, Italian Institute of Telemedicine, Varese, Italy
- Department of Cardiology, Sechenov First Moscow State Medical University, Moscow, Russian Federation
| | - Christian Ott
- Department of Nephrology and Hypertension, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
| | - Telmo Pereira
- Polytechnic Institute of Coimbra, Coimbra Health School
- Laboratory for Applied Health Research (LabinSaúde), Rua 5 de Outubro-SM Bispo, Coimbra, Portugal
| | - Giacomo Pucci
- Unit of Internal Medicine at Terni University Hospital, Department of Medicine, University of Perugia, Perugia, Italy
| | - Roland Schmieder
- Department of Nephrology and Hypertension, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
| | - Ji-Guang Wang
- Centre for Epidemiological Studies and Clinical Trials, Shanghai Key Laboratory of Hypertension, The Shanghai Institute of Hypertension, Department of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Thomas Weber
- Cardiology Department, Klinikum Wels-Grieskirchen, Wels, Austria
| | - Berend E Westerhof
- Department of Pulmonary Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Bryan Williams
- Institute of Cardiovascular Sciences University College London (UCL) and National Institute for Health Research (NIHR) UCL/UCL Hospitals Biomedical Research Centre, London, United Kingdom
| | - James E Sharman
- Menzies Institute for Medical Research, University of Tasmania
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25
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Yogev D, Goldberg T, Arami A, Tejman-Yarden S, Winkler TE, Maoz BM. Current state of the art and future directions for implantable sensors in medical technology: Clinical needs and engineering challenges. APL Bioeng 2023; 7:031506. [PMID: 37781727 PMCID: PMC10539032 DOI: 10.1063/5.0152290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 08/28/2023] [Indexed: 10/03/2023] Open
Abstract
Implantable sensors have revolutionized the way we monitor biophysical and biochemical parameters by enabling real-time closed-loop intervention or therapy. These technologies align with the new era of healthcare known as healthcare 5.0, which encompasses smart disease control and detection, virtual care, intelligent health management, smart monitoring, and decision-making. This review explores the diverse biomedical applications of implantable temperature, mechanical, electrophysiological, optical, and electrochemical sensors. We delve into the engineering principles that serve as the foundation for their development. We also address the challenges faced by researchers and designers in bridging the gap between implantable sensor research and their clinical adoption by emphasizing the importance of careful consideration of clinical requirements and engineering challenges. We highlight the need for future research to explore issues such as long-term performance, biocompatibility, and power sources, as well as the potential for implantable sensors to transform healthcare across multiple disciplines. It is evident that implantable sensors have immense potential in the field of medical technology. However, the gap between research and clinical adoption remains wide, and there are still major obstacles to overcome before they can become a widely adopted part of medical practice.
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Affiliation(s)
| | | | | | | | | | - Ben M. Maoz
- Authors to whom correspondence should be addressed: and
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26
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Chemla D, Agnoletti D, Jozwiak M, Zhang Y, Protogerou AD, Millasseau S, Blacher J. Non-Invasive Estimation of Central Systolic Blood Pressure by Radial Tonometry: A Simplified Approach. J Pers Med 2023; 13:1244. [PMID: 37623496 PMCID: PMC10455683 DOI: 10.3390/jpm13081244] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/03/2023] [Accepted: 08/07/2023] [Indexed: 08/26/2023] Open
Abstract
BACKROUND Central systolic blood pressure (cSBP) provides valuable clinical and physiological information. A recent invasive study showed that cSBP can be reliably estimated from mean (MBP) and diastolic (DBP) blood pressure. In this non-invasive study, we compared cSBP calculated using a Direct Central Blood Pressure estimation (DCBP = MBP2/DBP) with cSBP estimated by radial tonometry. METHODS Consecutive patients referred for cardiovascular assessment and prevention were prospectively included. Using applanation tonometry with SphygmoCor device, cSBP was estimated using an inbuilt generalized transfer function derived from radial pressure waveform, which was calibrated to oscillometric brachial SBP and DBP. The time-averaged MBP was calculated from the radial pulse waveform. The minimum acceptable error (DCBP-cSBP) was set at ≤5 (mean) and ≤8 mmHg (SD). RESULTS We included 160 patients (58 years, 54%men). The cSBP was 123.1 ± 18.3 mmHg (range 86-181 mmHg). The (DCBP-cSBP) error was -1.4 ± 4.9 mmHg. There was a linear relationship between cSBP and DCBP (R2 = 0.93). Forty-seven patients (29%) had cSBP values ≥ 130 mmHg, and a DCBP value > 126 mmHg exhibited a sensitivity of 91.5% and specificity of 94.7% in discriminating this threshold (Youden index = 0.86; AUC = 0.965). CONCLUSIONS Using the DCBP formula, radial tonometry allows for the robust estimation of cSBP without the need for a generalized transfer function. This finding may have implications for risk stratification.
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Affiliation(s)
- Denis Chemla
- INSERM UMRS 999, Hôpital Marie Lannelongue, 92350 Le Plessis-Robinson, France;
| | - Davide Agnoletti
- Hypertension and Cardiovascular Risk Research Center, Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy
- Cardiovascular Internal Medicine, Heart Chest and Vascular Department, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Mathieu Jozwiak
- Service de Médecine Intensive Réanimation CHU de Nice, 06200 Nice, France;
- UR2CA, Unité de Recherche Clinique Côte d’Azur, Université Côte d’Azur, 06200 Nice, France
| | - Yi Zhang
- Research Center for Epidemiology and Biostatistics, Sorbonne Paris Cité (CRESS), Université Paris Cité, AP-HP, Diagnosis and Therapeutic Center, Hôtel-Dieu, 1, Place du Parvis Notre Dame, 75004 Paris, France; (Y.Z.); (J.B.)
- Department of Cardiology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Middle Yanchang Road 301, Shanghai 200072, China
| | - Athanase D. Protogerou
- Cardiovascular Prevention & Research Unit, Clinic & Laboratory of Pathophysiology, Department of Medicine, National and Kapodistrian University of Athens, 10679 Athens, Greece;
| | | | - Jacques Blacher
- Research Center for Epidemiology and Biostatistics, Sorbonne Paris Cité (CRESS), Université Paris Cité, AP-HP, Diagnosis and Therapeutic Center, Hôtel-Dieu, 1, Place du Parvis Notre Dame, 75004 Paris, France; (Y.Z.); (J.B.)
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27
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Värri E, Suojanen L, Koskela JK, Choudhary MK, Tikkakoski A, Kähönen M, Nevalainen PI, Mustonen J, Pörsti I. Ambulatory daytime blood pressure versus tonometric blood pressure measurements in the laboratory: effect of posture. Blood Press Monit 2023; 28:199-207. [PMID: 37318783 PMCID: PMC10309093 DOI: 10.1097/mbp.0000000000000651] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 02/23/2023] [Indexed: 06/16/2023]
Abstract
OBJECTIVE To compare blood pressure (BP) in tonometric radial artery recordings during passive head-up tilt with ambulatory recordings and evaluate possible laboratory cutoff values for hypertension. METHODS Laboratory BP and ambulatory BP were recorded in normotensive (n = 69), unmedicated hypertensive (n = 190), and medicated hypertensive (n = 151) subjects. RESULTS Mean age was 50.2 years, BMI 27.7 kg/m 2 , ambulatory daytime BP 139/87 mmHg, and 276 were male (65%). As supine-to-upright changes in SBP ranged from -52 to +30 mmHg, and in DBP from -21 to +32 mmHg, the mean values of BP supine and upright measurements were compared with ambulatory BP. The mean(supine+upright) systolic laboratory BP was corresponding to ambulatory level (difference +1 mmHg), while mean(supine+upright) DBP was 4 mmHg lower ( P < 0.05) than ambulatory value. Correlograms indicated that laboratory 136/82 mmHg corresponded to ambulatory 135/85 mmHg. When compared with ambulatory 135/85 mmHg, the sensitivity and specificity of laboratory 136/82 mmHg to define hypertension were 71.5% and 77.3% for SBP, and 71.7% and 72.8%, for DBP, respectively. The laboratory cutoff 136/82 mmHg classified 311/410 subjects similarly to ambulatory BP as normotensive or hypertensive, 68 were hypertensive only in ambulatory, while 31 were hypertensive only in laboratory measurements. CONCLUSION BP responses to upright posture were variable. When compared with ambulatory BP, mean(supine+upright) laboratory cutoff 136/82 mmHg classified 76% of subjects similarly as normotensive or hypertensive. In the remaining 24% the discordant results may be attributed to white-coat or masked hypertension, or higher physical activity during out-of-office recordings.
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Affiliation(s)
- Emmi Värri
- Faculty of Medicine and Health Technology, Tampere University, Departments of
| | - Lauri Suojanen
- Faculty of Medicine and Health Technology, Tampere University, Departments of
- Internal Medicine
| | - Jenni K. Koskela
- Faculty of Medicine and Health Technology, Tampere University, Departments of
- Internal Medicine
| | - Manoj K. Choudhary
- Faculty of Medicine and Health Technology, Tampere University, Departments of
| | - Antti Tikkakoski
- Clinical Physiology, Tampere University Hospital, Tampere, Finland
| | - Mika Kähönen
- Faculty of Medicine and Health Technology, Tampere University, Departments of
- Clinical Physiology, Tampere University Hospital, Tampere, Finland
| | | | - Jukka Mustonen
- Faculty of Medicine and Health Technology, Tampere University, Departments of
- Internal Medicine
| | - Ilkka Pörsti
- Faculty of Medicine and Health Technology, Tampere University, Departments of
- Internal Medicine
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28
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Bui TV, Picone DS, Schultz MG, Peng X, Black JA, Dwyer N, Roberts-Thomson P, Adams H, Chen CH, Cheng HM, Pucci G, Wang J, Goupil R, Sharman JE. Accuracy of cuff blood pressure and systolic blood pressure amplification. Hypertens Res 2023; 46:1961-1969. [PMID: 37217732 PMCID: PMC10404511 DOI: 10.1038/s41440-023-01311-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/23/2023] [Accepted: 04/12/2023] [Indexed: 05/24/2023]
Abstract
Automated cuff measured blood pressure (BP) is the global standard used for diagnosing hypertension, but there are concerns regarding the accuracy of the method. Individual variability in systolic BP (SBP) amplification from central (aorta) to peripheral (brachial) arteries could be related to the accuracy of cuff BP, but this has never been determined and was the aim of this study. Automated cuff BP and invasive brachial BP were recorded in 795 participants (74% male, aged 64 ± 11 years) receiving coronary angiography at five independent research sites (using seven different automated cuff BP devices). SBP amplification was recorded invasively by catheter and defined as brachial SBP minus aortic SBP. Compared with invasive brachial SBP, cuff SBP was significantly underestimated (130 ± 18 mmHg vs. 138 ± 22 mmHg, p < 0.001). The level of SBP amplification varied significantly among individuals (mean ± SD, 7.3 ± 9.1 mmHg) and was similar to level of difference between cuff and invasive brachial SBP (mean difference -7.6 ± 11.9 mmHg). SBP amplification explained most of the variance in accuracy of cuff SBP (R2 = 19%). The accuracy of cuff SBP was greatest among participants with the lowest SBP amplification (ptrend < 0.001). After cuff BP values were corrected for SBP amplification, there was a significant improvement in the mean difference from the intra-arterial standard (p < 0.0001) and in the accuracy of hypertension classification according to 2017 ACC/AHA guideline thresholds (p = 0.005). The level of SBP amplification is a critical factor associated with the accuracy of conventional automated cuff measured BP.
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Affiliation(s)
- Tan V Bui
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Dean S Picone
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Martin G Schultz
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Xiaoqing Peng
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - J Andrew Black
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
- Royal Hobart Hospital, Hobart, TAS, Australia
| | - Nathan Dwyer
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
- Royal Hobart Hospital, Hobart, TAS, Australia
| | - Philip Roberts-Thomson
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
- Royal Hobart Hospital, Hobart, TAS, Australia
| | - Heath Adams
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
- Royal Hobart Hospital, Hobart, TAS, Australia
| | - Chen-Huan Chen
- Department of Medicine, National Yang Ming Chiao Tung University, Department of Medical Education, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Hao-Min Cheng
- Department of Medicine, National Yang Ming Chiao Tung University, Department of Medical Education, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Giacomo Pucci
- Unit of Internal Medicine at Terni University Hospital, Department of Medicine, University of Perugia, Perugia, Italy
| | - Jiguang Wang
- Centre for Epidemiological Studies and Clinical Trials, Shanghai Key Laboratory of Hypertension, The Shanghai Institute of Hypertension, Department of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Remi Goupil
- Hopital du Sacre-Coeur de Montreal, Universite de Montreal, Montreal, Canada
| | - James E Sharman
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia.
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Argha A, Celler BG, Yong A, Rubenis I, Butlin M, Avolio A. New Perspectives on Non-invasive Blood Pressure Measurement. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2023; 2023:1-4. [PMID: 38082761 DOI: 10.1109/embc40787.2023.10340757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Noninvasive blood pressure (NIBP) devices are calibrated against validated auscultation sphygmomanometers using Korotkoff sounds. This study aimed to investigate the timing of Korotkoff sounds in relation to pulse appearance in the brachial artery and values of intra-arterial blood pressure. Experiments were carried out on 15 participants, (14 males, 64.3 ± 10.4 years; one female, 86 yo), undergoing coronary angiography. A conventional occluding cuff, with a microphone for Korotkoff sounds, was placed on the upper arm (on the brachial artery). Intra-arterial blood pressure (IABP) was measured below the cuff with a fluid-filled catheter inserted via the radial artery and an external transducer. Finger photoplethysmography was used to measure brachial pulse wave velocity (PWV). Korotkoff sounds were processed electronically and custom algorithms identified the cuff pressure (CP) at which the first and last Korotkoff sounds were heard. PWV and max slope of the IABP pressure pulse were recorded to estimate arterial stiffness. The brachial artery closed at a CP of 132.0 ± 17.1 mmHg. Systolic and diastolic blood pressure (SBP and DBP) were 147.6 ± 14.3 and 72.7 ± 10.1 mmHg; mean pressure (MP, 100.1 ± 10.4 mmHg) was similar to MP derived from the peak of the oscillogram (98.5 ± 13.6 mmHg). Difference between IABP and CP recorded at first and last occurrence of Korotkoff sounds were, SBP: 19.0 ± 8.3 (range 2-29) mmHg, DBP: 4.0 ± 4.3 (range 2-12) mmHg. SBP derived from the onset of Korotkoff sounds can underestimate IABP by up to 19 mmHg. Since Korotkoff sounds are the recommended method mandated by the universal standard for the validation of blood pressure measuring devices, these errors are propagated through to all NIBP measurement devices irrespective of whether they use auscultatory or oscillometric methods.
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Chen Y, Li MX, Wang Y, Jin X, Liu L, Zhou ZF, Ding FH, Zhang RY, Li Y, Shen CX. Brachial and central hypertension in relation to coronary stenosis in patients with coronary angiography. J Clin Hypertens (Greenwich) 2023. [PMID: 37378546 DOI: 10.1111/jch.14691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 05/26/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023]
Abstract
The clinical significance of central beyond brachial blood pressure (BP) remains unclear. In patients who underwent coronary angiography, the authors explored whether elevated central BP would be associated with coronary arterial disease (CAD) irrespective of the status of brachial hypertension. From March 2021 to April 2022, 335 patients (mean age 64.9 years, 69.9% men) hospitalized for suspected CAD or unstable angina were screened in an ongoing trial. CAD was defined if a coronary stenosis of ≥50%. According to the presence of brachial (non-invasive cuff systolic BP ≥140 mmHg or diastolic BP ≥90 mmHg) and central (invasive systolic BP ≥130 mmHg) hypertension, patients were cross-classified as isolated brachial hypertension (n = 23), isolated central hypertension (n = 93), and concordant normotension (n = 100) or hypertension (n = 119). In continuous analyses, both brachial and central systolic BPs were significantly related to CAD with similar standardized odds ratios (OR, 1.47 and 1.45, p < .05). While categorical analyses showed that patients with isolated central hypertension or concordant hypertension had a significantly higher prevalence of CAD and the Gensini score than those with concordant normotension. Multivariate-adjusted OR (95% confidence interval [CI]) for CAD was 2.24 (1.16 to 4.33, p = .009) for isolated central hypertension and 3.02 (1.58 to 5.78, p < .001) for concordant hypertension relative to concordant normotension. The corresponding OR (95% CI) of a high Gensini score was 2.40 (1.26-4.58) and 2.17 (1.19-3.96), respectively. In conclusion, regardless of the presence of brachial hypertension, elevated central BP was associated with the presence and severity of CAD, indicating that central hypertension is an important risk factor for coronary atherosclerosis.
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Affiliation(s)
- Yu Chen
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Ming-Xuan Li
- Department of Cardiovascular Medicine, Shanghai Institute of Hypertension, Shanghai Key Laboratory of Hypertension, National Research Centre for Translational Medicine, Ruijin Hospital, Shanghai Jiatong University School of Medicine, Shanghai, China
| | - Ying Wang
- Department of Cardiovascular Medicine, Shanghai Institute of Hypertension, Shanghai Key Laboratory of Hypertension, National Research Centre for Translational Medicine, Ruijin Hospital, Shanghai Jiatong University School of Medicine, Shanghai, China
| | - Xian Jin
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Liang Liu
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Zhen-Fa Zhou
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Feng-Hua Ding
- Department of Cardiovascular Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Rui-Yan Zhang
- Department of Cardiovascular Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yan Li
- Department of Cardiovascular Medicine, Shanghai Institute of Hypertension, Shanghai Key Laboratory of Hypertension, National Research Centre for Translational Medicine, Ruijin Hospital, Shanghai Jiatong University School of Medicine, Shanghai, China
| | - Cheng-Xing Shen
- Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Manga S, Muthavarapu N, Redij R, Baraskar B, Kaur A, Gaddam S, Gopalakrishnan K, Shinde R, Rajagopal A, Samaddar P, Damani DN, Shivaram S, Dey S, Mitra D, Roy S, Kulkarni K, Arunachalam SP. Estimation of Physiologic Pressures: Invasive and Non-Invasive Techniques, AI Models, and Future Perspectives. SENSORS (BASEL, SWITZERLAND) 2023; 23:5744. [PMID: 37420919 DOI: 10.3390/s23125744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 05/25/2023] [Accepted: 06/12/2023] [Indexed: 07/09/2023]
Abstract
The measurement of physiologic pressure helps diagnose and prevent associated health complications. From typical conventional methods to more complicated modalities, such as the estimation of intracranial pressures, numerous invasive and noninvasive tools that provide us with insight into daily physiology and aid in understanding pathology are within our grasp. Currently, our standards for estimating vital pressures, including continuous BP measurements, pulmonary capillary wedge pressures, and hepatic portal gradients, involve the use of invasive modalities. As an emerging field in medical technology, artificial intelligence (AI) has been incorporated into analyzing and predicting patterns of physiologic pressures. AI has been used to construct models that have clinical applicability both in hospital settings and at-home settings for ease of use for patients. Studies applying AI to each of these compartmental pressures were searched and shortlisted for thorough assessment and review. There are several AI-based innovations in noninvasive blood pressure estimation based on imaging, auscultation, oscillometry and wearable technology employing biosignals. The purpose of this review is to provide an in-depth assessment of the involved physiologies, prevailing methodologies and emerging technologies incorporating AI in clinical practice for each type of compartmental pressure measurement. We also bring to the forefront AI-based noninvasive estimation techniques for physiologic pressure based on microwave systems that have promising potential for clinical practice.
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Affiliation(s)
- Sharanya Manga
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Neha Muthavarapu
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Renisha Redij
- GIH Artificial Intelligence Laboratory (GAIL), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | | | - Avneet Kaur
- Microwave Engineering and Imaging Laboratory (MEIL), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Sunil Gaddam
- Microwave Engineering and Imaging Laboratory (MEIL), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Keerthy Gopalakrishnan
- GIH Artificial Intelligence Laboratory (GAIL), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Microwave Engineering and Imaging Laboratory (MEIL), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Rutuja Shinde
- Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | | | - Poulami Samaddar
- Microwave Engineering and Imaging Laboratory (MEIL), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Devanshi N Damani
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Department of Internal Medicine, Texas Tech University Health Science Center, El Paso, TX 79995, USA
| | - Suganti Shivaram
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | - Shuvashis Dey
- Microwave Engineering and Imaging Laboratory (MEIL), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Department of Electrical and Computer Engineering, North Dakota State University, Fargo, ND 58105, USA
| | - Dipankar Mitra
- Microwave Engineering and Imaging Laboratory (MEIL), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Department of Computer Science, University of Wisconsin-La Crosse, La Crosse, WI 54601, USA
| | - Sayan Roy
- Microwave Engineering and Imaging Laboratory (MEIL), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Department of Electrical Engineering and Computer Science, South Dakota Mines, Rapid City, SD 57701, USA
| | - Kanchan Kulkarni
- Centre de Recherche Cardio-Thoracique de Bordeaux, University of Bordeaux, INSERM, U1045, 33000 Bordeaux, France
- IHU Liryc, Heart Rhythm Disease Institute, Fondation Bordeaux Université, Bordeaux, 33600 Pessac, France
| | - Shivaram P Arunachalam
- GIH Artificial Intelligence Laboratory (GAIL), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Department of Radiology, Mayo Clinic, Rochester, MN 55905, USA
- Microwave Engineering and Imaging Laboratory (MEIL), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
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Almeida TP, Cortés M, Perruchoud D, Alexandre J, Vermare P, Sola J, Shah J, Marques L, Pellaton C. Aktiia cuffless blood pressure monitor yields equivalent daytime blood pressure measurements compared to a 24-h ambulatory blood pressure monitor: Preliminary results from a prospective single-center study. Hypertens Res 2023; 46:1456-1461. [PMID: 37012424 PMCID: PMC10239726 DOI: 10.1038/s41440-023-01258-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 02/03/2023] [Accepted: 03/03/2023] [Indexed: 04/05/2023]
Abstract
In this preliminary study, we compared daytime blood pressure (BP) measurements performed by a commercially available cuffless-and continual-BP monitor (Aktiia monitor, Neuchâtel, Switzerland) and a traditional ambulatory BP monitor (ABPM; Dyasis 3, Novacor, Paris, France) from 52 patients enrolled in a 12-week cardiac rehabilitation (CR) program (Neuchâtel, Switzerland). Daytime (9am-9pm) systolic (SBP) and diastolic (DBP) BP from 7-day averaged data from Aktiia monitor were compared to 1-day averaged BP data from ABPM. No significant differences were found between the Aktiia monitor and the ABPM for SBP (μ ± σ [95% confidence interval]: 1.6 ± 10.5 [-1.5, 4.6] mmHg, P = 0.306; correlation [R2]: 0.70; ± 10/ ± 15 mmHg agreements: 60%, 84%). Marginally non-significant bias was found for DBP (-2.2 ± 8.0 [-4.5, 0.1] mmHg, P = 0.058; R2: 0.66; ±10/±15 mmHg agreements: 78%, 96%). These intermediate results show that daytime BP measurements using the Aktiia monitor generate data comparable to that of an ABPM monitor.
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Affiliation(s)
| | | | | | | | | | | | - Jay Shah
- Aktiia SA, Neuchâtel, Switzerland
- Division of Cardiology, Mayo Clinic Arizona, Phoenix, AZ, USA
| | - Luisa Marques
- Division of Cardiology, Réseau Hospitalier Neuchâtelois (RHNe), Neuchâtel, Switzerland
| | - Cyril Pellaton
- Division of Cardiology, Réseau Hospitalier Neuchâtelois (RHNe), Neuchâtel, Switzerland
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Goupil R, Nadeau-Fredette AC, Prasad B, Hundemer GL, Suri RS, Beaubien-Souligny W, Agharazii M. CENtral blood pressure Targeting: a pragmatic RAndomized triaL in advanced Chronic Kidney Disease (CENTRAL-CKD): A Clinical Research Protocol. Can J Kidney Health Dis 2023; 10:20543581231172407. [PMID: 37168686 PMCID: PMC10164859 DOI: 10.1177/20543581231172407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 03/26/2023] [Indexed: 05/13/2023] Open
Abstract
Background Emerging data favor central blood pressure (BP) over brachial cuff BP to predict cardiovascular and kidney events, as central BP more closely relates to the true aortic BP. Considering that patients with advanced chronic kidney disease (CKD) are at high cardiovascular risk and can have unreliable brachial cuff BP measurements (due to high arterial stiffness), this population could benefit the most from hypertension management using central BP measurements. Objective To assess the feasibility and efficacy of targeting central BP as opposed to brachial BP in patients with CKD G4-5. Design Pragmatic multicentre double-blinded randomized controlled pilot trial. Setting Seven large academic advanced kidney care clinics across Canada. Patients A total of 116 adults with CKD G4-5 (estimated glomerular filtration rate [eGFR] < 30 mL/min) and brachial cuff systolic BP between 120 and 160 mm Hg. The key exclusion criteria are 1) ≥ 5 BP drugs, 2) recent acute kidney injury, myocardial infarction, stroke, heart failure or injurious fall, 3) previous kidney replacement therapy. Methods Double-blind randomization to a central or a brachial cuff systolic BP target (both < 130 mm Hg) as measured by a validated central BP device. The study duration is 12 months with follow-up visits every 2 to 4 months, based on local practice. All other aspects of CKD management are at the discretion of the attending nephrologist. Outcomes Primary Feasibility: Feasibility of a large-scale trial based on predefined components. Primary Efficacy: Carotid-femoral pulse wave velocity at 12 months. Others: Efficacy (eGFR decline, albuminuria, BP drugs, and quality of life); Events (major adverse cardiovascular events, CKD progression, hospitalization, mortality); Safety (low BP events and acute kidney injury). Limitations May be challenging to distinguish whether central BP is truly different from brachial BP to the point of significantly influencing treatment decisions. Therapeutic inertia may be a barrier to successfully completing a randomized trial in a population of CKD G4-5. These 2 aspects will be evaluated in the feasibility assessment of the trial. Conclusion This is the first trial to evaluate the feasibility and efficacy of using central BP to manage hypertension in advanced CKD, paving the way to a future large-scale trial. Trial registration clinicaltrials.gov (NCT05163158).
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Affiliation(s)
- Rémi Goupil
- Hopital du Sacré-Coeur de Montréal, Université de Montréal, QC, Canada
| | | | | | - Gregory L. Hundemer
- Division of Nephrology, Department of Medicine, The Ottawa Hospital Research Institute, University of Ottawa, ON, Canada
| | - Rita S. Suri
- McGill University Health Centre, McGill University, Montréal, QC, Canada
| | | | - Mohsen Agharazii
- Centre Hospitalier Universitaire de Québec, Université Laval, Canada
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Scalia A, Ghafari C, Navarre W, Delmotte P, Phillips R, Carlier S. High Fidelity Pressure Wires Provide Accurate Validation of Non-Invasive Central Blood Pressure and Pulse Wave Velocity Measurements. Biomedicines 2023; 11:biomedicines11041235. [PMID: 37189852 DOI: 10.3390/biomedicines11041235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/12/2023] [Accepted: 04/17/2023] [Indexed: 05/17/2023] Open
Abstract
Central blood pressure (cBP) is known to be a better predictor of the damage caused by hypertension in comparison with peripheral blood pressure. During cardiac catheterization, we measured cBP in the ascending aorta with a fluid-filled guiding catheter (FF) in 75 patients and with a high-fidelity micromanometer tipped wire (FFR) in 20 patients. The wire was withdrawn into the brachial artery and aorto-brachial pulse wave velocity (abPWV) was calculated from the length of the pullback and the time delay between the ascending aorta and the brachial artery pulse waves by gating to the R-wave of the ECG for both measurements. In 23 patients, a cuff was inflated around the calf and an aorta-tibial pulse wave velocity (atPWV) was calculated from the distance between the cuff around the leg and the axillary notch and the time delay between the ascending aorta and the tibial pulse waves. Brachial BP was measured non-invasively and cBP was estimated using a new suprasystolic oscillometric technology. The mean differences between invasively measured cBP by FFR and non-invasive estimation were -0.4 ± 5.7 mmHg and by FF 5.4 ± 9.4 mmHg in 52 patients. Diastolic and mean cBP were both overestimated by oscillometry, with mean differences of -8.9 ± 5.5 mmHg and -6.4 ± 5.1 mmHg compared with the FFR and -10.6 ± 6.3 mmHg and -5.9 ± 6.2 mmHg with the FF. Non-invasive systolic cBP compared accurately with the high-fidelity FFR measurements, demonstrating a low bias (≤5 mmHg) and high precision (SD ≤ 8 mmHg). These criteria were not met when using the FF measurements. Invasively derived average Ao-brachial abPWV was 7.0 ± 1.4 m/s and that of Ao-tibial atPWV was 9.1 ± 1.8 m/s. Non-invasively estimated PWV based on the reflected wave transit time did not correlate with abPWV or with atPWV. In conclusion, we demonstrate the advantages of a novel method of validation for non-invasive cBP monitoring devices using acknowledged gold standard FFR wire transducers and the possibility to easily measure PWV during coronary angiography with the impact of cardiovascular risk factors.
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Affiliation(s)
- Alessandro Scalia
- Department of Cardiology, Centre Hospitalier Universitaire Ambroise Paré, 7000 Mons, Belgium
- Department of Cardiology, UMONS Research Institute for Health Sciences and Technology, University of Mons (UMONS), 7000 Mons, Belgium
| | - Chadi Ghafari
- Department of Cardiology, UMONS Research Institute for Health Sciences and Technology, University of Mons (UMONS), 7000 Mons, Belgium
| | - Wivine Navarre
- Faculty of Medicine, Université Libre de Bruxelles, 1070 Bruxelles, Belgium
| | - Philippe Delmotte
- Department of Cardiology, Centre Hospitalier Universitaire Ambroise Paré, 7000 Mons, Belgium
| | - Rob Phillips
- The School of Medicine, The University of Queensland, Brisbane 4072, Australia
| | - Stéphane Carlier
- Department of Cardiology, Centre Hospitalier Universitaire Ambroise Paré, 7000 Mons, Belgium
- Department of Cardiology, UMONS Research Institute for Health Sciences and Technology, University of Mons (UMONS), 7000 Mons, Belgium
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Feng Q, Wei J, Wang Y, Wu J, Kong H, Guo S, Liu G, Dong J, Jiang L, Li Q, Nie J, Yang J. Focusing on testosterone levels in male: A half-longitudinal study of polycyclic aromatic hydrocarbon exposure and diastolic blood pressure in coke oven workers. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 329:121614. [PMID: 37087084 DOI: 10.1016/j.envpol.2023.121614] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/30/2023] [Accepted: 04/09/2023] [Indexed: 05/03/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) can interfere with testosterone levels, and low levels of testosterone are associated with increased cardiovascular events. To explore the role of testosterone in PAHs exposure and cardiovascular health, we used data from the 2011-2016 National Health and Nutrition Examination Survey (NHANES) and a longitudinal database of 332 male coke oven workers from China. The urine PAHs, tobacco metabolites and plasma testosterone levels of coke oven workers were measured. There were inverse associations between serum (plasma) testosterone concentrations and the risk of dysarteriotony and dyslipidemia among the NHANES participants and coke oven workers. The results of the cross-lagged panel analysis among workers showed that the decrease in testosterone preceded the increase in diastolic blood pressure (DBP), and the absolute value of the path coefficient from baseline testosterone to follow-up DBP (β2 = -8.162, P = 0.077) was significantly larger than the absolute value of the path coefficient from baseline DBP to follow-up testosterone (β1 = -0.001, P = 0.781). Results from the half-longitudinal mediation analysis showed that baseline hydroxyfluorene predicted significant decreases in plasma testosterone from baseline to follow-up (path a: 0.71, 95% CI: 1.26, -0.16), whereas plasma testosterone at baseline also predicted significant increments in DBP from baseline to follow-up (path b: 9.22, 95% CI: 17.24, -1.19). The indirect effect of PAHs on DBP via plasma testosterone level was marginally significant (test for indirect effects a*b (P = 0.08)). In conclusion, testosterone level is a longitudinal precursor to increased DBP and plays an essential role in the association between PAHs exposure and damage to the cardiovascular system. Coke oven workers with low plasma testosterone levels are more likely to experience adverse changes in blood pressure and lipid levels after exposure to PAHs.
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Affiliation(s)
- Quan Feng
- Department of Occupational Health, School of Public Health, Shanxi Medical University, NHC Key Laboratory of Pneumoconiosis, China
| | - Jiajun Wei
- Department of Occupational Health, School of Public Health, Shanxi Medical University, NHC Key Laboratory of Pneumoconiosis, China
| | - Yong Wang
- Department of Occupational Health, School of Public Health, Shanxi Medical University, NHC Key Laboratory of Pneumoconiosis, China
| | - Jinyu Wu
- Department of Occupational Health, School of Public Health, Shanxi Medical University, NHC Key Laboratory of Pneumoconiosis, China
| | - Hongyue Kong
- Department of Occupational Health, School of Public Health, Shanxi Medical University, NHC Key Laboratory of Pneumoconiosis, China
| | - Shugang Guo
- Shanxi Provincial Center for Disease Control and Prevention, China
| | - Gaisheng Liu
- Center of Occupational Disease Prevention, Xishan Coal Electricity (Group) Co., Ltd, China
| | - Jun Dong
- Center of Occupational Disease Prevention, Xishan Coal Electricity (Group) Co., Ltd, China
| | - Liuquan Jiang
- Center of Occupational Disease Prevention, Xishan Coal Electricity (Group) Co., Ltd, China
| | - Qiang Li
- Center of Occupational Disease Prevention, Xishan Coal Electricity (Group) Co., Ltd, China
| | - Jisheng Nie
- Department of Occupational Health, School of Public Health, Shanxi Medical University, NHC Key Laboratory of Pneumoconiosis, China
| | - Jin Yang
- Department of Occupational Health, School of Public Health, Shanxi Medical University, NHC Key Laboratory of Pneumoconiosis, China.
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Automated 'oscillometric' blood pressure measuring devices: how they work and what they measure. J Hum Hypertens 2023; 37:93-100. [PMID: 35637256 PMCID: PMC9957730 DOI: 10.1038/s41371-022-00693-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/27/2022] [Accepted: 04/07/2022] [Indexed: 11/09/2022]
Abstract
Automated 'oscillometric' blood pressure (BP) measuring devices (BPMDs) were developed in the 1970s to replace manual auscultatory BP measurement by mercury sphygmomanometer. Automated BPMDs that have passed accuracy testing versus a reference auscultatory sphygmomanometer using a scientifically accepted validation protocol are recommended for clinical use globally. Currently, there are many thousands of unique automated BPMDs manufactured by hundreds of companies, with each device using proprietary algorithms to estimate BP and using a method of operation that is largely unchanged since inception. Validated automated BPMDs provide similar BP values to those recorded using manual auscultation albeit with potential sources of error mostly associated with using empirical algorithms to derive BP from waveform pulsations. Much of the work to derive contemporary BP thresholds and treatment targets used to manage cardiovascular disease risk was obtained using automated BPMDs. While there is room for future refinement to improve accuracy for better individual risk stratification, validated BPMDs remain the recommended standard for office and out-of-office BP measurement to be used in hypertension diagnosis and management worldwide.
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Picone DS, Stoneman E, Cremer A, Schultz MG, Otahal P, Hughes AD, Black JA, Bos WJ, Chen CH, Cheng HM, Dwyer N, Lacy P, Laugesen E, Liang F, Kim HL, Ohte N, Okada S, Omboni S, Ott C, Pereira T, Pucci G, Rajani R, Schmieder R, Sinha MD, Stewart R, Stouffer GA, Takazawa K, Wang J, Weber T, Westerhof BE, Williams B, Yamada H, Sharman JE. Sex Differences in Blood Pressure and Potential Implications for Cardiovascular Risk Management. Hypertension 2023; 80:316-324. [PMID: 35912678 DOI: 10.1161/hypertensionaha.122.19693] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Accurate blood pressure (BP) measurement is critical for optimal cardiovascular risk management. Age-related trajectories for cuff-measured BP accelerate faster in women compared with men, but whether cuff BP represents the intraarterial (invasive) aortic BP is unknown. This study aimed to determine the sex differences between cuff BP, invasive aortic BP, and the difference between the 2 measurements. METHODS Upper-arm cuff BP and invasive aortic BP were measured during coronary angiography in 1615 subjects from the Invasive Blood Pressure Consortium Database. This analysis comprised 22 different cuff BP devices from 28 studies. RESULTS Subjects were 64±11 years (range 40-89) and 32% women. For the same cuff systolic BP (SBP), invasive aortic SBP was 4.4 mm Hg higher in women compared with men. Cuff and invasive aortic SBP were higher in women compared with men, but the sex difference was more pronounced from invasive aortic SBP, was the lowest in younger ages, and the highest in older ages. Cuff diastolic blood pressure overestimated invasive diastolic blood pressure in both sexes. For cuff and invasive diastolic blood pressure separately, there were sex*age interactions in which diastolic blood pressure was higher in younger men and lower in older men, compared with women. Cuff pulse pressure underestimated invasive aortic pulse pressure in excess of 10 mm Hg for both sexes in older age. CONCLUSIONS For the same cuff SBP, invasive aortic SBP was higher in women compared with men. How this translates to cardiovascular risk prediction needs to be determined, but women may be at higher BP-related risk than estimated by cuff measurements.
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Affiliation(s)
- Dean S Picone
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., E.S., M.G.S., P.O., J.A.B., N.D.)
| | - Elif Stoneman
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., E.S., M.G.S., P.O., J.A.B., N.D.)
| | - Antoine Cremer
- Department of Cardiology/Hypertension, University Hospital of Bordeaux, France (A.C.)
| | - Martin G Schultz
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., E.S., M.G.S., P.O., J.A.B., N.D.)
| | - Petr Otahal
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., E.S., M.G.S., P.O., J.A.B., N.D.)
| | - Alun D Hughes
- MRC Unit for Lifelong Health and Ageing at UCL, Institute of Cardiovascular Sciences, University College London, United Kingdom (A.D.H.)
| | - J Andrew Black
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., E.S., M.G.S., P.O., J.A.B., N.D.).,Royal Hobart Hospital, Hobart, Australia (J.A.B., N.D.)
| | - Willem Jan Bos
- Department of Internal Medicine, St Antonius Hospital, Nieuwegein, The Netherlands (W.J.B.).,Department of Internal Medicine, Leiden University Medical Center, The Netherlands (W.J.B.)
| | - Chen-Huan Chen
- Department of Internal Medicine, National Yang Ming Chiao Tung University College of Medicine (C.-H.C.)
| | - Hao-Min Cheng
- Department of Medicine (H.-M.C.), National Yang Ming Chiao Tung University College of Medicine, Taipei, Taiwan.,Institute of Public Health (H.-M.C.), National Yang Ming Chiao Tung University College of Medicine, Taipei, Taiwan.,Center for Evidence-based Medicine (H.-M.C.), Taipei Veterans General Hospital, Taiwan.,Department of Medical Education (H.-M.C.), Taipei Veterans General Hospital, Taiwan.,Institute of Health and Welfare Policy, National Yang Ming Chiao Tung University College of Medicine, Taipei, Taiwan (H.-M.C.)
| | - Nathan Dwyer
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia (D.S.P., E.S., M.G.S., P.O., J.A.B., N.D.).,Royal Hobart Hospital, Hobart, Australia (J.A.B., N.D.)
| | - Peter Lacy
- Institute of Cardiovascular Sciences University College London (UCL) and National Institute for Health Research (NIHR) UCL/UCL Hospitals Biomedical Research Centre, United Kingdom (P.L., B.W.)
| | - Esben Laugesen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Denmark (E.L.)
| | - Fuyou Liang
- School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, China (F.L.).,World-Class Research Center "Digital biodesign and personalized healthcare", Sechenov First Moscow State Medical University, Russia (F.L.)
| | - Hack-Lyoung Kim
- Division of Cardiology, Seoul National University Boramae Hospital, Seoul, South Korea (H.-L.K.)
| | - Nobuyuki Ohte
- Department of Cardio-Renal Medicine and Hypertension, Nagoya City University Graduate School of Medical Sciences, Japan (N.O.)
| | - Sho Okada
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Japan (S.O.)
| | - Stefano Omboni
- Clinical Research Unit, Italian Institute of Telemedicine, Varese, Italy (S.O.).,Department of Cardiology, Sechenov First Moscow State Medical University, Russian Federation (S.O.)
| | - Christian Ott
- Department of Nephrology and Hypertension, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Germany (C.O., R.S.)
| | - Telmo Pereira
- Polytechnic Institute of Coimbra, Coimbra Health School, Coimbra, Portugal (T.P.).,Laboratory for Applied Health Research (LabinSaúde), Coimbra, Portugal (T.P.)
| | - Giacomo Pucci
- Unit of Internal Medicine at Terni University Hospital, Department of Medicine, University of Perugia, Italy (G.P.)
| | - Ronak Rajani
- Cardiology Department, Guy's and St. Thomas' Hospitals, London, United Kingdom (R.R.)
| | - Roland Schmieder
- Department of Nephrology and Hypertension, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Germany (C.O., R.S.)
| | - Manish D Sinha
- Kings College London British Heart Foundation Centre and Department of Clinical Pharmacology and Department of Paediatric Nephrology, Evelina London Children's Hospital, Guy's and St. Thomas' NHS Foundation Trust, United Kingdom (M.D.S)
| | - Ralph Stewart
- Green Lane Cardiovascular Service, Auckland City Hospital, University of Auckland, New Zealand (R.S.)
| | - George A Stouffer
- Division of Cardiology, University of North Carolina at Chapel Hill, Chapel Hill (G.A.S)
| | - Kenji Takazawa
- Center for Health Surveillance and Preventive Medicine, Tokyo Medical University Hospital, Japan (K.T.)
| | - Jiguang Wang
- Centre for Epidemiological Studies and Clinical Trials, Shanghai Key Laboratory of Hypertension, The Shanghai Institute of Hypertension, Department of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, China (J.W.)
| | - Thomas Weber
- Cardiology Department, Klinikum Wels-Grieskirchen, Austria (T.W.)
| | - Berend E Westerhof
- Department of Pulmonary Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Cardiovascular Sciences, The Netherlands (B.E.W.)
| | - Bryan Williams
- Institute of Cardiovascular Sciences University College London (UCL) and National Institute for Health Research (NIHR) UCL/UCL Hospitals Biomedical Research Centre, United Kingdom (P.L., B.W.)
| | - Hirotsugu Yamada
- Department of Community Medicine for Cardiology, Tokushima Graduate School of Biomedical Sciences, Japan (H.Y.)
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Central venous pressure estimation with force-coupled ultrasound of the internal jugular vein. Sci Rep 2023; 13:1500. [PMID: 36707658 PMCID: PMC9883282 DOI: 10.1038/s41598-022-22867-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 10/20/2022] [Indexed: 01/29/2023] Open
Abstract
We estimate central venous pressure (CVP) with force-coupled ultrasound imaging of the internal jugular vein (IJV). We acquire ultrasound images while measuring force applied over the IJV by the ultrasound probe imaging surface. We record collapse force, the force required to completely occlude the vein, in 27 healthy subjects. We find supine collapse force and jugular venous pulsation height (JVP), the clinical noninvasive standard, have a linear correlation coefficient of r2 = 0.89 and an average absolute difference of 0.23 mmHg when estimating CVP. We perturb our estimate negatively by tilting 16 degrees above supine and observe decreases in collapse force for every subject which are predictable from our CVP estimates. We perturb venous pressure positively to values experienced in decompensated heart failure by having subjects perform the Valsalva maneuver while the IJV is being collapsed and observe an increase in collapse force for every subject. Finally, we derive a CVP waveform with an inverse three-dimensional finite element optimization that uses supine collapse force and segmented force-coupled ultrasound data at approximately constant force.
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Bia D, Zócalo Y, Sánchez R, Torrado JF, Lev G, Mendiz O, Pessana F, Ramírez A, Cabrera-Fischer EI. Brachial Blood Pressure Invasively and Non-Invasively Obtained Using Oscillometry and Applanation Tonometry: Impact of Mean Blood Pressure Equations and Calibration Schemes on Agreement Levels. J Cardiovasc Dev Dis 2023; 10:jcdd10020045. [PMID: 36826541 PMCID: PMC9959257 DOI: 10.3390/jcdd10020045] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/28/2022] [Accepted: 12/06/2022] [Indexed: 01/27/2023] Open
Abstract
The use of oscillometric methods to determine brachial blood pressure (bBP) can lead to a systematic underestimation of the invasively measured systolic (bSBP) and pulse (bPP) pressure levels, together with a significant overestimation of diastolic pressure (bDBP). Similarly, the agreement between brachial mean blood pressure (bMBP), invasively and non-invasively measured, can be affected by inaccurate estimations/assumptions. Despite several methodologies that can be applied to estimate bMBP non-invasively, there is no consensus on which approach leads to the most accurate estimation. Aims: to evaluate the association and agreement between: (1) non-invasive (oscillometry) and invasive bBP; (2) invasive bMBP, and bMBP (i) measured by oscillometry and (ii) calculated using six different equations; and (3) bSBP and bPP invasively and non-invasively obtained by applanation tonometry and employing different calibration methods. To this end, invasive aortic blood pressure and bBP (catheterization), and non-invasive bBP (oscillometry [Mobil-O-Graph] and brachial artery applanation tonometry [SphygmoCor]) were simultaneously obtained (34 subjects, 193 records). bMBP was calculated using different approaches. Results: (i) the agreement between invasive bBP and their respective non-invasive measurements (oscillometry) showed dependence on bBP levels (proportional error); (ii) among the different approaches used to obtain bMBP, the equation that includes a form factor equal to 33% (bMBP = bDBP + bPP/3) showed the best association with the invasive bMBP; (iii) the best approach to estimate invasive bSBP and bPP from tonometry recordings is based on the calibration scheme that employs oscillometric bMBP. On the contrary, the worst association between invasive and applanation tonometry-derived bBP levels was observed when the brachial pulse waveform was calibrated to bMBP quantified as bMBP = bDBP + bPP/3. Our study strongly emphasizes the need for methodological transparency and consensus for non-invasive bMBP assessment.
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Affiliation(s)
- Daniel Bia
- Departamento de Fisiología, Facultad de Medicina, Centro Universitario de Investigación, Innovación y Diagnóstico Arterial (CUiiDARTE), Universidad de la República, Montevideo 11800, Uruguay
- Correspondence: or (D.B.); (Y.Z.)
| | - Yanina Zócalo
- Departamento de Fisiología, Facultad de Medicina, Centro Universitario de Investigación, Innovación y Diagnóstico Arterial (CUiiDARTE), Universidad de la República, Montevideo 11800, Uruguay
- Correspondence: or (D.B.); (Y.Z.)
| | - Ramiro Sánchez
- Metabolic Unit and Hypertension Unit, University Hospital, Favaloro Foundation, Buenos Aires 1093, Argentina
| | - Juan F. Torrado
- Departamento de Fisiología, Facultad de Medicina, Centro Universitario de Investigación, Innovación y Diagnóstico Arterial (CUiiDARTE), Universidad de la República, Montevideo 11800, Uruguay
| | - Gustavo Lev
- Department of Interventional Cardiology, University Hospital, Favaloro Foundation, Buenos Aires 1093, Argentina
| | - Oscar Mendiz
- Department of Interventional Cardiology, University Hospital, Favaloro Foundation, Buenos Aires 1093, Argentina
| | - Franco Pessana
- Department of Information Technology, Engineering and Exact Sciences Faculty, Favaloro University, Buenos Aires 1746, Argentina
| | - Agustín Ramírez
- IMETTYB, Favaloro University—CONICET, Buenos Aires 1746, Argentina
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Bia D, Zócalo Y, Sánchez R, Lev G, Mendiz O, Pessana F, Ramirez A, Cabrera-Fischer EI. Aortic systolic and pulse pressure invasively and non-invasively obtained: Comparative analysis of recording techniques, arterial sites of measurement, waveform analysis algorithms and calibration methods. Front Physiol 2023; 14:1113972. [PMID: 36726850 PMCID: PMC9885133 DOI: 10.3389/fphys.2023.1113972] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 01/05/2023] [Indexed: 01/18/2023] Open
Abstract
Background: The non-invasive estimation of aortic systolic (aoSBP) and pulse pressure (aoPP) is achieved by a great variety of devices, which differ markedly in the: 1) principles of recording (applied technology), 2) arterial recording site, 3) model and mathematical analysis applied to signals, and/or 4) calibration scheme. The most reliable non-invasive procedure to obtain aoSBP and aoPP is not well established. Aim: To evaluate the agreement between aoSBP and aoPP values invasively and non-invasively obtained using different: 1) recording techniques (tonometry, oscilometry/plethysmography, ultrasound), 2) recording sites [radial, brachial (BA) and carotid artery (CCA)], 3) waveform analysis algorithms (e.g., direct analysis of the CCA pulse waveform vs. peripheral waveform analysis using general transfer functions, N-point moving average filters, etc.), 4) calibration schemes (systolic-diastolic calibration vs. methods using BA diastolic and mean blood pressure (bMBP); the latter calculated using different equations vs. measured directly by oscillometry, and 5) different equations to estimate bMBP (i.e., using a form factor of 33% ("033"), 41.2% ("0412") or 33% corrected for heart rate ("033HR"). Methods: The invasive aortic (aoBP) and brachial pressure (bBP) (catheterization), and the non-invasive aoBP and bBP were simultaneously obtained in 34 subjects. Non-invasive aoBP levels were obtained using different techniques, analysis methods, recording sites, and calibration schemes. Results: 1) Overall, non-invasive approaches yielded lower aoSBP and aoPP levels than those recorded invasively. 2) aoSBP and aoPP determinations based on CCA recordings, followed by BA recordings, were those that yielded values closest to those recorded invasively. 3) The "033HR" and "0412" calibration schemes ensured the lowest mean error, and the "033" method determined aoBP levels furthest from those recorded invasively. 4) Most of the non-invasive approaches considered overestimated and underestimated aoSBP at low (i.e., 80 mmHg) and high (i.e., 180 mmHg) invasive aoSBP values, respectively. 5) The higher the invasively measured aoPP, the higher the level of underestimation provided by the non-invasive methods. Conclusion: The recording method and site, the mathematical method/model used to quantify aoSBP and aoPP, and to calibrate waveforms, are essential when estimating aoBP. Our study strongly emphasizes the need for methodological transparency and consensus for the non-invasive aoBP assessment.
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Affiliation(s)
- Daniel Bia
- Departamento de Fisiología, Centro Universitario de Investigación, Innovación y Diagnóstico Arterial (CUiiDARTE), Facultad de Medicina, Universidad de la República, Montevideo, Uruguay,*Correspondence: Daniel Bia, ; Yanina Zócalo,
| | - Yanina Zócalo
- Departamento de Fisiología, Centro Universitario de Investigación, Innovación y Diagnóstico Arterial (CUiiDARTE), Facultad de Medicina, Universidad de la República, Montevideo, Uruguay,*Correspondence: Daniel Bia, ; Yanina Zócalo,
| | - Ramiro Sánchez
- Metabolic Unit and Hypertension Unit, University Hospital, Favaloro Foundation, Buenos Aires, Argentina
| | - Gustavo Lev
- Department of Interventional Cardiology, University Hospital, Favaloro Foundation, Buenos Aires, Argentina
| | - Oscar Mendiz
- Department of Interventional Cardiology, University Hospital, Favaloro Foundation, Buenos Aires, Argentina
| | - Franco Pessana
- Department of Information Technology, Engineering and Exact Sciences Faculty, Favaloro University, Buenos Aires, Argentina
| | - Agustín Ramirez
- IMETTYB Favaloro University—CONICET, Buenos Aires, Argentina
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Herranz Olazabal J, Wieringa F, Hermeling E, Van Hoof C. Comparing Remote Speckle Plethysmography and Finger-Clip Photoplethysmography with Non-Invasive Finger Arterial Pressure Pulse Waves, Regarding Morphology and Arrival Time. BIOENGINEERING (BASEL, SWITZERLAND) 2023; 10:bioengineering10010101. [PMID: 36671673 PMCID: PMC9854800 DOI: 10.3390/bioengineering10010101] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/04/2023] [Accepted: 01/08/2023] [Indexed: 01/14/2023]
Abstract
OBJECTIVE The goal was to compare Speckle plethysmography (SPG) and Photoplethysmography (PPG) with non-invasive finger Arterial Pressure (fiAP) regarding Pulse Wave Morphology (PWM) and Pulse Arrival Time (PAT). METHODS Healthy volunteers (n = 8) were connected to a Non-Invasive Blood Pressure (NIBP) monitor providing fiAP pulse wave and PPG from a clinical transmission-mode SpO2 finger clip. Biopac recorded 3-lead ECG. A camera placed at a 25 cm distance recorded a video stream (100 fps) of a finger illuminated by a laser diode at 639 nm. A chest belt (Polar) monitored respiration. All signals were recorded simultaneously during episodes of spontaneous breathing and paced breathing. ANALYSIS Post-processing was performed in Matlab to obtain SPG and analyze the SPG, PPG and fiAP mean absolute deviations (MADs) on PWM, plus PAT modulation. RESULTS Across 2599 beats, the average fiAP MAD with PPG was 0.17 (0-1) and with SPG 0.09 (0-1). PAT derived from ECG-fiAP correlated as follows: 0.65 for ECG-SPG and 0.67 for ECG-PPG. CONCLUSION Compared to the clinical NIBP monitor fiAP reference, PWM from an experimental camera-derived non-contact reflective-mode SPG setup resembled fiAP significantly better than PPG from a simultaneously recorded clinical transmission-mode finger clip. For PAT values, no significant difference was found between ECG-SPG and ECG-PPG compared to ECG-fiAP.
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Affiliation(s)
- Jorge Herranz Olazabal
- IMEC, 3000 Leuven, Belgium
- Faculty of Engineering Science, Katholieke Universiteit Leuven (KUL), 3000 Leuven, Belgium
- IMEC NL, 5656 AE Eindhoven, The Netherlands
| | - Fokko Wieringa
- IMEC NL, 5656 AE Eindhoven, The Netherlands
- Division of Internal Medicine, Department of Nephrology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands
| | | | - Chris Van Hoof
- IMEC, 3000 Leuven, Belgium
- Faculty of Engineering Science, Katholieke Universiteit Leuven (KUL), 3000 Leuven, Belgium
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Lu J, Yin L. Sex differences in left ventricular stroke work and cardiac power output per unit myocardium relate to blood pressure in apparently healthy adults. PLoS One 2023; 18:e0280143. [PMID: 36608045 PMCID: PMC9821734 DOI: 10.1371/journal.pone.0280143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 12/21/2022] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Left ventricular stroke work per unit myocardium (LVSWM) and cardiac power output per unit myocardium (CPOM) are important measures of myocardial workload. The sex differences in the myocardial workload and its correlation with blood pressure remain largely unclear. OBJECTIVES The purpose of this study is to investigate the sex differences in LVSWM and CPOM, and to relate them to blood pressure in a cohort of apparently healthy adults. METHODS The LVSWM and CPOM were estimated in 596 age- and heart rate-matched apparently healthy adults (298 men) using transthoracic echocardiography combined with cuff-measured brachial blood pressure. The data were compared between sexes, and the sex differences in LVSWM and CPOM were related to blood pressure. RESULTS After adjustment for the blood pressure, the LVSWM and CPOM were higher in women than in men [75.0 (73.7-76.4) vs 64.9 (63.5-66.2) cJ/100g for LVSWM, and 912.4 (894.1-930.6) vs 780.2 (762.0-798.5) milliwatt/100g for CPOM, respectively; all P<0.001]. After adjustment for the LVSWM and CPOM, the mean systolic and diastolic blood pressure were 7.4 mm Hg and 5.2 mm Hg higher in men than in women, respectively (all P<0.001). CONCLUSIONS For any given blood pressure, the workload per unit myocardium is higher in apparently healthy women than in their male counterparts. A sex-specific definition of normal blood pressure with a relatively lower threshold for women can minimize the sex differences in the myocardial workload, which might reduce the potentially comparatively higher risk of heart failure in women.
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Affiliation(s)
- Jing Lu
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, P.R. China
| | - Lixue Yin
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, P.R. China
- Department of Cardiovascular Ultrasound and Non-invasive Cardiology, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, Chengdu, P.R. China
- Ultrasound in Cardiac Electrophysiology and Biomechanics Key Laboratory of Sichuan Province, Chengdu, P.R. China
- * E-mail:
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Stäuber A, Piper C, Köster M, Dörr M, Richter S, Ohlow MA, Eckert S, Baulmann J. Invasive validation of the Antares algorithm for determining central blood pressure based on upper arm oscillometric pulse waves in patients with type 2 diabetes. BMJ Open Diabetes Res Care 2023; 11:11/1/e003119. [PMID: 36707104 PMCID: PMC9884863 DOI: 10.1136/bmjdrc-2022-003119] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 01/18/2023] [Indexed: 01/28/2023] Open
Abstract
INTRODUCTION Antares is a pulse wave analysis (PWA) algorithm designed to allow a non-invasive estimation of central (aortic) blood pressure (cBP) using automated oscillometric blood pressure (BP) devices. Diabetes may affect elastic and muscular arteries differently, resulting in disparate pulse wave characteristics in central and peripheral arteries, which may limit the accuracy of PWA devices. The aim of our study was to evaluate the accuracy of Antares for estimating cBP as compared with invasively measured cBP in patients with type 2 diabetes. RESEARCH DESIGN AND METHODS In this study, consecutive patients undergoing elective coronary angiography were recruited between November 2017 and September 2020. In 119 patients with type 2 diabetes, cBP was measured invasively and simultaneously determined non-invasively using the custo screen 400 device with the integrated Antares algorithm. RESULTS The mean difference between the estimated and invasively measured cBP was 1.2±6.3 mmHg for central systolic BP (cSBP), 1.0±4.3 mmHg for central mean arterial pressure (cMAP) and 3.6±5.7 mmHg for central diastolic BP (cDBP). High correlations were found between estimated cBP and invasively measured cBP (cSBP: r=0.916; cMAP: r=0.882; cDBP: r=0.791; all p<0.001). CONCLUSIONS The present study suggests that the Antares algorithm incorporated into the custo screen 400 device can estimate cBP with high accuracy turning a conventional oscillometric BP device into a type II device for the non-invasive estimation of cBP, which is applicable in patients with type 2 diabetes. Integration of Antares into commercially available BP devices could facilitate the introduction of cBP into routine clinical practice as a part of disease and risk management.
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Affiliation(s)
- Alexander Stäuber
- Department of Movement and Training Science, Leipzig University, Leipzig, Sachsen, Germany
| | - Cornelia Piper
- Klinik für Allgemeine und Interventionelle Kardiologie/Angiologie, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
| | - Marco Köster
- Klinik für Allgemeine und Interventionelle Kardiologie/Angiologie, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
| | - Marcus Dörr
- Department of Internal Medicine B, University Medicine Greifswald, Greifswald, Mecklenburg-Vorpommern, Germany
- German Centre for Cardiovascular Research (DZHK), Partner Site Greifswald, Greifswald, Germany
| | - Stefan Richter
- Department of Cardiology, Zentralklinik Bad Berka GmbH, Bad Berka, Thüringen, Germany
- Department of Cardiology, SRH Klinikum Burgenlandkreis GmbH, Naumburg, Germany
| | | | - Siegfried Eckert
- Klinik für Allgemeine und Interventionelle Kardiologie/Angiologie, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Germany
| | - Johannes Baulmann
- Praxis Dres. Gille/Baulmann, Rheinbach, Germany
- Division of Cardiology, Medical University of Graz, Graz, Steiermark, Austria
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Alves GCVDM, Hotta GH, Aguiar DP, Oliveira LP, Leopoldino MAMD, Fortes JPA, Oliveira FCDMB, Santos Júnior FFU. IMMEDIATE EFFECT OF AN ORTHOSTATIC DEVICE IN AMPUTEES WHO PRACTICE PHYSICAL ACTIVITY. REV BRAS MED ESPORTE 2023. [DOI: 10.1590/1517-8692202329012021_0304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Introduction: Lower limb amputation affects mainly economically active young adults, causing great socio-economic impact due to impaired work capacity, socialization, and quality of life. Thus, the use of orthostatic devices could make reintegration of the individual back into the work environment possible. Objective: To evaluate the immediate effect of using a postural elevation device on physiological parameters and plantar pressure levels in amputees who practice physical activity. Methods: Sociodemographic and perceived sleep quality data were collected from 14 adults of both sexes with lower limb amputations, who practice physical activity. The participants were placed in postural elevation equipment for a period of 90 minutes with monitoring of physiological parameters such as blood pressure, heart rate, and oxygen saturation. Parameters related to the autonomic nervous system and plantar pressure levels were also evaluated. Data were also collected during recovery at 15- and 30-minute intervals after using the device. Data analysis was performed using two-way ANOVA or a mixed-effects model with Sidak's multiple comparisons test. Results: For all cardiovascular parameters (p>0.05) analyzed, the activation level of the autonomic nervous system (p>0.05), and plantar pressure (p>0.05), no evidence of differences was observed during use of the orthostatic device in all evaluated periods. Conclusion: The use of postural elevation equipment for 90 minutes does not generate, as an immediate effect, changes in physiological parameters and postural control in amputees who practice physical activity. Level of evidence II; Therapeutic studies – investigation of treatment results. Clinical relevance statement .
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Affiliation(s)
| | - Gisele Harumi Hotta
- Centro de Pesquisa, Desenvolvimento e Inovação da Dell, Brazil; Universidade de São Paulo, Brazil
| | | | - Liana Praça Oliveira
- Centro de Pesquisa, Desenvolvimento e Inovação da Dell, Brazil; Centro Universitário Estácio do Ceará, Brazil
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Peng P, Xu J, Hu K, Su H. The Effect of Three Different Cuff/Arm Circumference Ratios Ranging over 80% on Cuff Blood Pressure Measurements. Int Heart J 2023; 64:693-699. [PMID: 37518351 DOI: 10.1536/ihj.23-052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
We aimed to explore whether the cuff/arm (C/A) circumference ratio within the suggested range (> 80%) affects the accuracy of mercury cuff blood pressure (BP) measurement (cuff BP) using intrabrachial BP (IABP) as a reference.A total of 253 patients aged 62.42 ± 9.70 years were included. After coronary angiography, the catheter in the right arm was gradually withdrawn toward the cubital fossa, and the IABP was continuously recorded. The cuff BP of the right arm was measured based on the artery blood flow using a special method similar to the traditional mercury method. The cuff was replaced using another C/A ratio after one minute, and the test was performed again. We used three different cuffs for each participant to meet the C/A ratios of 80%-84%, 85%-89%, and 90%-100%. We calculated the percentage deviation degree (DD) between the cuff BP and IABP values: DD = difference/IABP × 100%. The agreement between the values was evaluated using the Bland-Altman method.The IABP values were 138.52 ± 16.89/79.67 ± 9.81 mmHg. The DD of the systolic BP (SBP), with a ratio of 80%-84% (3.06%), was the smallest. The DD of the diastolic BP (DBP) was lowest at a ratio of 85%-89% (2.47%). Men and women had the lowest DD of the SBP at a C/A ratio of 80%-84% and the lowest DD of the DBP at a C/A ratio of 85%-89%. Regardless of whether the participants had coronary heart disease, the DD of the SBP at a C/A ratio of 80%-84% was the lowest, and the DD of the DBP at a C/A ratio of 85%-89% was the lowest.Even in the suggested range of > 80%, when the C/A ratio was 80%-84%, the difference in the SBP between the cuff and IABP was the lowest, but when the C/A ratio was 85%-89%, the difference in the DBP was the lowest.
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Affiliation(s)
- Pengyishi Peng
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University
| | - Jingsong Xu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University
| | - Kun Hu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University
| | - Hai Su
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University
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Sharman JE. Value of measuring central blood pressure in clinical practice. Kidney Int 2023; 103:34-38. [PMID: 36603982 DOI: 10.1016/j.kint.2022.09.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/21/2022] [Accepted: 09/22/2022] [Indexed: 01/04/2023]
Affiliation(s)
- James E Sharman
- Menzies Institute for Medical Research, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, Australia.
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Qin K, Huang W, Zhang T, Tang S. Machine learning and deep learning for blood pressure prediction: a methodological review from multiple perspectives. Artif Intell Rev 2022. [DOI: 10.1007/s10462-022-10353-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Khan Mamun MMR, Sherif A. Advancement in the Cuffless and Noninvasive Measurement of Blood Pressure: A Review of the Literature and Open Challenges. BIOENGINEERING (BASEL, SWITZERLAND) 2022; 10:bioengineering10010027. [PMID: 36671599 PMCID: PMC9854981 DOI: 10.3390/bioengineering10010027] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022]
Abstract
Hypertension is a chronic condition that is one of the prominent reasons behind cardiovascular disease, brain stroke, and organ failure. Left unnoticed and untreated, the deterioration in a health condition could even result in mortality. If it can be detected early, with proper treatment, undesirable outcomes can be avoided. Until now, the gold standard is the invasive way of measuring blood pressure (BP) using a catheter. Additionally, the cuff-based and noninvasive methods are too cumbersome or inconvenient for frequent measurement of BP. With the advancement of sensor technology, signal processing techniques, and machine learning algorithms, researchers are trying to find the perfect relationships between biomedical signals and changes in BP. This paper is a literature review of the studies conducted on the cuffless noninvasive measurement of BP using biomedical signals. Relevant articles were selected using specific criteria, then traditional techniques for BP measurement were discussed along with a motivation for cuffless measurement use of biomedical signals and machine learning algorithms. The review focused on the progression of different noninvasive cuffless techniques rather than comparing performance among different studies. The literature survey concluded that the use of deep learning proved to be the most accurate among all the cuffless measurement techniques. On the other side, this accuracy has several disadvantages, such as lack of interpretability, computationally extensive, standard validation protocol, and lack of collaboration with health professionals. Additionally, the continuing work by researchers is progressing with a potential solution for these challenges. Finally, future research directions have been provided to encounter the challenges.
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Affiliation(s)
| | - Ahmed Sherif
- School of Computing Sciences and Computer Engineering, The University of Southern Mississippi, Hattiesburg, MS 39406, USA
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Romanchuk O. Comparative features of the immediate impact of manual therapy traction manipulations on the cardiorespiratory system of men and women. PHYSICAL REHABILITATION AND RECREATIONAL HEALTH TECHNOLOGIES 2022; 7:130-142. [DOI: https:/doi.org/10.15391/prrht.2022-7(4).24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Purpose: the aim of this study was to determine the principal differences of changes in the cardiorespiratory system activity under the influence of traction manipulations in the thoracic spine of men and women. Material & Methods: the 26 adults were involved in the study, including 18 women aged 39.6±12.1 years and 8 men aged 36.3±8.3 years. All patients were diagnosed with osteochondrosis of the thoracic spine, which was confirmed by radiographic examination. The study of the cardiorespiratory system was conducted in the first procedure of SMT before and after the use of traction manipulations directly in the physician office. The integrated method of studying the cardiorespiratory system defined as spiroarteriocardiorhythmography (SACR) was used. It simultaneously records the heart rate, rhythms of systolic and diastolic pressure at each heartbeat and respiratory rhythms, which provides significant time savings to determine the functional state of the heart, vessels and respiration, as well as to identify the important parameters of their interaction. Results: characterizing the changes in the cardiorespiratory system as a whole under the influence of traction manipulations on the thoracic spine, it should be noted that men and women had some significant unidirectional changes in HR (min–1), CO (dm3), CI (dm3/m2), IH (n. u.), which are determined primarily by the decrease in HR (min–1) under the influence of traction manipulations. As to the men, the significant effects were more related to the impact on the contractile function of the heart, which was confirmed by the improvement of the electrical systole of the ventricles (QTC, s), the increase in the activity of the effects of the parasympathetic branch of the ANS on the cardiac rhythm (HF, ms2) and a certain increase in the stroke index within the normative values (SI, cm3/m2), then to the women the significant effects were more related to the influence on the breathing pattern and vascular tone. Thus, characteristic and positive effects in women can be considered a decrease in the variability of diastolic blood pressure in the very-low-frequency range (VLFDBP, mmHg2), which is combined with a decrease in the total power of diastolic pressure variability (TPDBP, mmHg2) and an increase in the total peripheral vascular resistance (GPVR, dyn/s/cm−5). Conclusions: summarizing the results of the impact of traction manipulations in the thoracic spine on the cardiorespiratory system of men and women, it can be stated that their effect is different and has features associated with the use of different mechanisms. For men, the predominant effect is on the heart contractile function, and for women it is on the respiratory system and autonomous regulation of vascular tone.
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Cecelja M, Ruijsink B, Puyol‐Antón E, Li Y, Godwin H, King AP, Razavi R, Chowienczyk P. Aortic Distensibility Measured by Automated Analysis of Magnetic Resonance Imaging Predicts Adverse Cardiovascular Events in UK Biobank. J Am Heart Assoc 2022; 11:e026361. [PMID: 36444831 PMCID: PMC9851433 DOI: 10.1161/jaha.122.026361] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 08/04/2022] [Indexed: 11/30/2022]
Abstract
Background Automated analysis of cardiovascular magnetic resonance images provides the potential to assess aortic distensibility in large populations. The aim of this study was to compare the prediction of cardiovascular events by automated cardiovascular magnetic resonance with those of other simple measures of aortic stiffness suitable for population screening. Methods and Results Aortic distensibility was measured from automated segmentation of aortic cine cardiovascular magnetic resonance using artificial intelligence in 8435 participants. The associations of distensibility, brachial pulse pressure, and stiffness index (obtained by finger photoplethysmography) with conventional risk factors was examined by multivariable regression and incident cardiovascular events by Cox proportional-hazards regression. Mean (±SD) distensibility values for men and women were 1.77±1.15 and 2.10±1.45 (P<0.0001) 10-3 mm Hg-1, respectively. There was a good correlation between automatically and manually obtained systolic and diastolic aortic areas (r=0.980 and r=0.985, respectively). In regression analysis, distensibility associated with age, mean arterial pressure, heart rate, weight, and plasma glucose but not male sex, cholesterol or current smoking. During an average follow-up of 2.8±1.3 years, 86 participants experienced cardiovascular events 6 of whom died. Higher distensibility was associated with reduced risk of cardiovascular events (adjusted hazard ratio [HR], 0.61 per log unit of distensibility; P=0.016). There was no evidence of an association between pulse pressure (adjusted HR 1.00; P=0.715) or stiffness index (adjusted HR, 1.02; P=0.535) and risk of cardiovascular events. Conclusions Automated cardiovascular magnetic resonance-derived aortic distensibility may be incorporated into routine clinical imaging. It shows a similar association to cardiovascular risk factors as other measures of arterial stiffness and predicts new-onset cardiovascular events, making it a useful tool for the measurement of vascular aging and associated cardiovascular risk.
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Affiliation(s)
- Marina Cecelja
- King’s College London British Heart Foundation Centre, Department of Clinical PharmacologySt Thomas’ HospitalLondonUnited Kingdom
| | - Bram Ruijsink
- School of Bioengineering and Imaging SciencesKing’s College LondonLondonUnited Kingdom
| | - Esther Puyol‐Antón
- School of Bioengineering and Imaging SciencesKing’s College LondonLondonUnited Kingdom
| | - Ye Li
- King’s College London British Heart Foundation Centre, Department of Clinical PharmacologySt Thomas’ HospitalLondonUnited Kingdom
| | - Harriet Godwin
- King’s College London British Heart Foundation CentreSchool of Cardiovascular Medicine & Sciences, Department of CardiologyLondonUnited Kingdom
| | - Andrew P. King
- School of Bioengineering and Imaging SciencesKing’s College LondonLondonUnited Kingdom
| | - Reza Razavi
- School of Bioengineering and Imaging SciencesKing’s College LondonLondonUnited Kingdom
| | - Phil Chowienczyk
- King’s College London British Heart Foundation Centre, Department of Clinical PharmacologySt Thomas’ HospitalLondonUnited Kingdom
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