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Dewig HG, Cohen JN, Renaghan EJ, Leary ME, Leary BK, Au JS, Tenan MS. Are Wearable Photoplethysmogram-Based Heart Rate Variability Measures Equivalent to Electrocardiogram? A Simulation Study. Sports Med 2024:10.1007/s40279-024-02066-5. [PMID: 38935328 DOI: 10.1007/s40279-024-02066-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/06/2024] [Indexed: 06/28/2024]
Abstract
BACKGROUND Traditional electrocardiography (ECG)-derived heart rate variability (HRV) and photoplethysmography (PPG)-derived "HRV" (termed PRV) have been reported interchangeably. Any potential dissociation between HRV and PRV could be due to the variability in pulse arrival time (PAT; time between heartbeat and peripheral pulse). OBJECTIVE This study examined if PRV is equivalent to ECG-derived HRV and if PRV's innate error makes it a high-quality measurement separate from HRV. METHODS ECG data from 1084 subjects were obtained from the PhysioNet Autonomic Aging dataset, and individual PAT dispersions for both the wrist (n = 42) and finger (n = 49) were derived from Mol et al. (Exp Gerontol. 2020; 135: 110938). A Bayesian simulation was constructed whereby the individual arrival times of the PPG wave were calculated by placing a Gaussian prior on the individual QRS-wave timings of each ECG series. The standard deviation (σ) of the prior corresponds to the PAT dispersion from Mol et al. This was simulated 10,000 times for each PAT σ. The root mean square of successive differences (RMSSD) and standard deviation of N-N intervals (SDNN) were calculated for both HRV and PRV. The Region of Practical Equivalence bounds (ROPE) were set a priori at ± 0.2% of true HRV. The highest density interval (HDI) width, encompassing 95% of the posterior distribution, was calculated for each PAT σ. RESULTS The lowest PAT σ (2.0 SD) corresponded to 88.4% within ROPE for SDNN and 21.4% for RMSSD. As the σ of PAT increases, the equivalence of PRV and HRV decreases for both SDNN and RMSSD. The HDI interval width increases with increasing PAT σ, with the HDI width increasing at a higher rate for RMSSD than SDNN. CONCLUSIONS For individuals with greater PAT variability, PRV is not a surrogate for HRV. When considering PRV as a unique biometric measure, SDNN may have more favorable measurement properties than RMSSD, though both exhibit a non-uniform measurement error.
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Affiliation(s)
- Hayden G Dewig
- Rockefeller Neuroscience Institute, West Virginia University, 33 Medical Center Dr, Morgantown, WV, 26505, USA
| | - Jeremy N Cohen
- Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, ON, Canada
| | - Eric J Renaghan
- Department of Athletics, University of Miami, Coral Gables, FL, USA
| | - Miriam E Leary
- Division of Exercise Physiology, West Virginia University, Morgantown, WV, USA
| | - Brian K Leary
- Division of Exercise Physiology, West Virginia University, Morgantown, WV, USA
| | - Jason S Au
- Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, ON, Canada
| | - Matthew S Tenan
- Rockefeller Neuroscience Institute, West Virginia University, 33 Medical Center Dr, Morgantown, WV, 26505, USA.
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2
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Namkoong M, McMurray J, Branan K, Hernandez J, Gandhi M, Ida-Oze S, Cote G, Tian L. Contact pressure-guided wearable dual-channel bioimpedance device for continuous hemodynamic monitoring. ADVANCED MATERIALS TECHNOLOGIES 2024; 9:2301407. [PMID: 38665229 PMCID: PMC11044990 DOI: 10.1002/admt.202301407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Indexed: 04/28/2024]
Abstract
Wearable devices for continuous monitoring of arterial pulse waves have the potential to improve the diagnosis, prognosis, and management of cardiovascular diseases. These pulse wave signals are often affected by the contact pressure between the wearable device and the skin, limiting the accuracy and reliability of hemodynamic parameter quantification. Here, we report a continuous hemodynamic monitoring device that enables the simultaneous recording of dual-channel bioimpedance and quantification of pulse wave velocity (PWV) used to calculate blood pressure (BP). Our investigations demonstrate the effect of contact pressure on bioimpedance and PWV. The pulsatile bioimpedance magnitude reached its maximum when the contact pressure approximated the mean arterial pressure of the subject. We employed PWV to continuously quantify BP while maintaining comfortable contact pressure for prolonged wear. The mean absolute error and standard deviation of the error compared to the reference value were determined to be 0.1 ± 3.3 mmHg for systolic BP, 1.3 ± 3.7 mmHg for diastolic BP, and -0.4 ± 3.0 mmHg for mean arterial pressure when measurements were conducted in the lying down position. This research demonstrates the potential of wearable dual-bioimpedance sensors with contact pressure guidance for reliable and continuous hemodynamic monitoring.
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Affiliation(s)
- Myeong Namkoong
- Department of Biomedical Engineering, and Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX 77843, USA
| | - Justin McMurray
- Department of Biomedical Engineering, and Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX 77843, USA
| | - Kimberly Branan
- Department of Biomedical Engineering, and Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX 77843, USA
| | - Joanna Hernandez
- Department of Biomedical Engineering, and Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX 77843, USA
| | - Mishika Gandhi
- Department of Biomedical Engineering, and Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX 77843, USA
| | - Samuel Ida-Oze
- Department of Biomedical Engineering, and Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX 77843, USA
| | - Gerard Cote
- Department of Biomedical Engineering, and Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX 77843, USA
| | - Limei Tian
- Department of Biomedical Engineering, and Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX 77843, USA
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3
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Dorogovtsev VN, Yankevich DS, Gaydashev AE, Martyushev-Poklad AV, Podolskaya JA, Borisov IV, Grechko AV. Preclinical Orthostatic Abnormalities May Predict Early Increase in Vascular Stiffness in Different Age Groups: A Pilot Study. Diagnostics (Basel) 2023; 13:3243. [PMID: 37892064 PMCID: PMC10606479 DOI: 10.3390/diagnostics13203243] [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: 08/30/2023] [Revised: 10/06/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Clinical orthostatic hypotension (OH) and hypertension (OHT) are risk factors for arterial hypertension (AH) and cardiovascular diseases (CVD) and are associated with increased vascular stiffness. Preclinical OH and OHT are poorly understood. The main objective was to investigate preclinical orthostatic abnormalities and their association with increased vascular stiffness in different age groups of adults. A specially designed head-up tilt test standardized for hydrostatic column height was used to detect them. Three age groups of clinically healthy subjects were examined. In the group of young adults up to 30 years old, a significant predominance of orthostatic normotension (ONT) and an insignificant number of subjects with preclinical OH and OHT were found. In the age group over 45 years, compared to the group under 30 years, there was a twofold decrease in the proportion of individuals with ONT and a significant increase with preclinical OH and OHT. In all age groups, there was a significant orthostatic increase in vascular stiffness (as measured by the brachial-ankle pulse wave velocity (baPWV), which was recovered to the baseline level when returning to the supine position. Overall, subjects with preclinical OH and OHT had significantly higher baPWV values compared to those with ONT (p = 0.001 and p = 0.002, respectively), with all subjects having vascular stiffness values within normal age-related values.
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Affiliation(s)
- Victor N. Dorogovtsev
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 107031 Moscow, Russia; (D.S.Y.); (A.V.M.-P.); (J.A.P.); (A.V.G.)
| | - Dmitry S. Yankevich
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 107031 Moscow, Russia; (D.S.Y.); (A.V.M.-P.); (J.A.P.); (A.V.G.)
| | - Andrey E. Gaydashev
- Problem Scientific Research Laboratory, Smolensk State Medical University, 214019 Smolensk, Russia;
| | - Andrey V. Martyushev-Poklad
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 107031 Moscow, Russia; (D.S.Y.); (A.V.M.-P.); (J.A.P.); (A.V.G.)
| | - Julia A. Podolskaya
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 107031 Moscow, Russia; (D.S.Y.); (A.V.M.-P.); (J.A.P.); (A.V.G.)
| | - Ilya V. Borisov
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 107031 Moscow, Russia; (D.S.Y.); (A.V.M.-P.); (J.A.P.); (A.V.G.)
| | - Andrey V. Grechko
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 107031 Moscow, Russia; (D.S.Y.); (A.V.M.-P.); (J.A.P.); (A.V.G.)
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Jagtap S, Kumar A, Mahale B, Dixit J, Kalange AE, Kanawade R, Gangal S, Vidyasagar P. Response of cardiac pulse parameters in humans at various inclinations via 360° rotating platform for simulated microgravity perspective. NPJ Microgravity 2023; 9:54. [PMID: 37463938 DOI: 10.1038/s41526-023-00301-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 07/02/2023] [Indexed: 07/20/2023] Open
Abstract
On the Earth, the human body is designed and adapted to function under uniform gravitational acceleration. However, exposure to microgravity or weightlessness as experienced by astronauts in space causes significant alterations in the functioning of the human cardiovascular system. Due to limitations in using real microgravity platforms, researchers opted for various ground-based microgravity analogs including head-down tilt (HDT) at fixed inclination. However, in the present study, an investigation of response of various cardiac parameters and their circulatory adaptation in 18 healthy male subjects was undertaken by using an indigenously developed 360° rotating platform. Cardiac pulse was recorded from 0° to 360° in steps of 30° inclination using piezoelectric pulse sensor (MLT1010) and associated cardiac parameters were analyzed. The results showed significant changes in the pulse shape while an interesting oscillating pattern was observed in associated cardiac parameters when rotated from 0° to 360°. The response of cardiac parameters became normal after returning to supine posture indicating the ability of the cardiovascular system to reversibly adapt to the postural changes. The observed changes in cardiac parameters at an inclination of 270°, in particular, were found to be comparable with spaceflight studies. Based on the obtained results and the proposed extended version of fluid redistribution mechanism, we herewith hypothesize that the rotation of a subject to head down tilt inclination (270°) along with other inclinations could represent a better microgravity analog for understanding the cumulative cardiac response of astronauts in space, particularly for short duration space missions.
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Affiliation(s)
- Sagar Jagtap
- Department of Physics, Haribhai V. Desai College, Pune, MS, 411002, India.
| | - Ajay Kumar
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, MS, 411008, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
| | - Bhoopesh Mahale
- Department of Electronics, Savitribai Phule Pune University, Pune, MS, 411007, India
| | - Jyotsana Dixit
- Department of Microbiology, Savitribai Phule Pune University, Pune, MS, 411007, India
| | - Ashok E Kalange
- Department of Physics, Tuljaram Chaturchand College, Baramati, Dist., Pune, 413102, MS, India
| | - Rajesh Kanawade
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, MS, 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Shashikala Gangal
- Department of Electronics, Savitribai Phule Pune University, Pune, MS, 411007, India
| | - Pandit Vidyasagar
- Department of Physics, Savitribai Phule Pune University, Pune, MS, 411007, India.
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5
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Paterson C, Higgins S, Sikk M, Stone K, Fryer S, Stoner L. Acute sedentary behavior and cardiovascular disease research: standardizing the methodological posture. Am J Physiol Heart Circ Physiol 2023; 324:H122-H125. [PMID: 36525481 PMCID: PMC9829480 DOI: 10.1152/ajpheart.00492.2022] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Sedentary behavior has been identified as an independent predictor of future cardiovascular disease risk and all-cause mortality. To explain this association, a growing body of literature has sought to investigate the physiological underpinnings of this association with the goal of developing a biologically plausible model. In time, this biologically plausible model can be tested, and effective, translatable public health guidelines can be developed. However, to ensure that evidence across studies can be effectively synthesized, it is necessary to ensure their congruency and comparability. Although there are several key factors that should be considered and controlled across prolonged sitting studies, one pertinent issue is that of participant posture. There is currently a discourse within the literature regarding the posture that cardiovascular assessments are performed in and rest periods between posture transitions and subsequent measures. This perspectives piece makes the case for standardizing approaches across the research area and offers practical recommendations for future work.
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Affiliation(s)
- Craig Paterson
- 1Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Simon Higgins
- 1Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Merilin Sikk
- 2Department of Sport, Hartpury University, Hartpury, United Kingdom
| | - Keeron Stone
- 3Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Simon Fryer
- 4School of Natural, Social, and Sport Sciences, University of Gloucestershire, Gloucester, United Kingdom
| | - Lee Stoner
- 1Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina,5Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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Iannella G, Cammaroto G, Meccariello G, Cannavicci A, Gobbi R, Lechien JR, Calvo-Henríquez C, Bahgat A, Di Prinzio G, Cerritelli L, Maniaci A, Cocuzza S, Polimeni A, Magliulo G, Greco A, de Vincentiis M, Ralli M, Pace A, Polimeni R, Lo Re F, Morciano L, Moffa A, Casale M, Vicini C. Head-Of-Bed Elevation (HOBE) for Improving Positional Obstructive Sleep Apnea (POSA): An Experimental Study. J Clin Med 2022; 11:jcm11195620. [PMID: 36233488 PMCID: PMC9571825 DOI: 10.3390/jcm11195620] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/18/2022] [Accepted: 09/20/2022] [Indexed: 11/16/2022] Open
Abstract
Purpose: Evaluate the effectiveness of the head-of-bed elevation position (HOBE) with a 30° elevation of the head and trunk, in improving obstruction of the upper airways in obstructive sleep apnea (OSA) patients. A prospective trial simultaneously performing drug-induced sleep endoscopy (DISE) and polysomnography (PSG) tests was performed. Methods: Forty-five patients were included in the prospective study protocol. All patients enrolled in the study and underwent the following evaluations: (1) a drug-induced sleep endoscopy, with an evaluation of obstructions and collapse of the upper airways at 0° and in a HOBE position, with head and trunk elevation of 30°; (2) an overnight PSG assessment in the hospital with head and trunk elevation from 0° to 30° during the night; (3) a questionnaire to evaluate the feedback of patients to sleeping with head-of-bed elevation. Results: Velum (V) and oropharynx lateral wall (O) collapses were reduced in the 30° up position. There were no statistical differences that emerged in the obstruction of the tongue base and epiglottis between the 0° position and the 30° up position (p > 0.05). The average AHI score changed from 23.8 ± 13.3 (0° supine position) to 17.7 ± 12.4 (HOBE position), with a statistical difference (p = 0.03); the same statistical difference emerged in the percentage of apneas that decreased from 55 ± 28.1 to 44 ± 25.8 (p = 0.05). Conclusions: By adopting the HOBE position with 30° elevation of the head and trunk, it is possible to obtain a reduction of upper airways collapses and an improvement of apnea/hypopnea events and nightly respiratory outcomes.
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Affiliation(s)
- Giannicola Iannella
- Department of ‘Organi di Senso’, University “Sapienza”, Viale dell’Università, 33, 00185 Rome, Italy
| | - Giovanni Cammaroto
- Department of Head-Neck Surgery, Otolaryngology, Head-Neck and Oral Surgery Unit, Morgagni Pierantoni Hospital, Via Carlo Forlanini 34, 47121 Forlì, Italy
- Correspondence:
| | - Giuseppe Meccariello
- Department of Head-Neck Surgery, Otolaryngology, Head-Neck and Oral Surgery Unit, Morgagni Pierantoni Hospital, Via Carlo Forlanini 34, 47121 Forlì, Italy
| | - Angelo Cannavicci
- Department of Head-Neck Surgery, Otolaryngology, Head-Neck and Oral Surgery Unit, Morgagni Pierantoni Hospital, Via Carlo Forlanini 34, 47121 Forlì, Italy
| | - Riccardo Gobbi
- Department of Head-Neck Surgery, Otolaryngology, Head-Neck and Oral Surgery Unit, Morgagni Pierantoni Hospital, Via Carlo Forlanini 34, 47121 Forlì, Italy
| | - Jerome Rene Lechien
- Laboratory of Anatomy and Cell Biology, Faculty of Medicine, University of Mons (UMONS), Avenue du Champ de Mars 6, B7000 Mons, Belgium
| | - Christian Calvo-Henríquez
- Clinic of Otolaryngology, Hospital Complex of Santiago de Compostela, 15706 Santiago de Compostela, Spain
| | - Ahmed Bahgat
- Department of Otorhinolaryngology, Alexandria University, Elazaritta, Alexandria 0020, Egypt
| | - Giuseppe Di Prinzio
- Department ENT & Audiology, University of Ferrara, Via Savonarola 9, 44121 Ferrara, Italy
| | - Luca Cerritelli
- Department ENT & Audiology, University of Ferrara, Via Savonarola 9, 44121 Ferrara, Italy
| | - Antonino Maniaci
- Department of Medical and Surgical Sciences and Advanced Technologies “GF Ingrassia”, ENT Section, University of Catania, Via S. Sofia 78, 95125 Catania, Italy
| | - Salvatore Cocuzza
- Department of Medical and Surgical Sciences and Advanced Technologies “GF Ingrassia”, ENT Section, University of Catania, Via S. Sofia 78, 95125 Catania, Italy
| | - Antonella Polimeni
- Department of Oral and Maxillo Facial Sciences, “Sapienza” University of Rome, 00161 Rome, Italy
| | - Giuseppe Magliulo
- Department of ‘Organi di Senso’, University “Sapienza”, Viale dell’Università, 33, 00185 Rome, Italy
| | - Antonio Greco
- Department of ‘Organi di Senso’, University “Sapienza”, Viale dell’Università, 33, 00185 Rome, Italy
| | - Marco de Vincentiis
- Department of ‘Organi di Senso’, University “Sapienza”, Viale dell’Università, 33, 00185 Rome, Italy
| | - Massimo Ralli
- Department of ‘Organi di Senso’, University “Sapienza”, Viale dell’Università, 33, 00185 Rome, Italy
| | - Annalisa Pace
- Department of ‘Organi di Senso’, University “Sapienza”, Viale dell’Università, 33, 00185 Rome, Italy
| | - Roberta Polimeni
- Department of ‘Organi di Senso’, University “Sapienza”, Viale dell’Università, 33, 00185 Rome, Italy
| | - Federica Lo Re
- Department of ‘Organi di Senso’, University “Sapienza”, Viale dell’Università, 33, 00185 Rome, Italy
| | - Laura Morciano
- Department of ‘Organi di Senso’, University “Sapienza”, Viale dell’Università, 33, 00185 Rome, Italy
| | - Antonio Moffa
- School of Medicine, Campus Bio-Medico University, Via Alvaro del Portillo 21, 00128 Rome, Italy
| | - Manuele Casale
- School of Medicine, Campus Bio-Medico University, Via Alvaro del Portillo 21, 00128 Rome, Italy
| | - Claudio Vicini
- Department of Head-Neck Surgery, Otolaryngology, Head-Neck and Oral Surgery Unit, Morgagni Pierantoni Hospital, Via Carlo Forlanini 34, 47121 Forlì, Italy
- Department ENT & Audiology, University of Ferrara, Via Savonarola 9, 44121 Ferrara, Italy
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7
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Li FX, Li YP, Zhang HY, Tian MJ, Gao HH, Zhang GJ, Su P. Guidewire-Assisted Reduction Technology Combined with Postural Reduction Improves the Success Rate of Internal Vein Catheterisation. JOURNAL OF HEALTHCARE ENGINEERING 2022; 2022:7171578. [PMID: 35620382 PMCID: PMC9130005 DOI: 10.1155/2022/7171578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/25/2022] [Accepted: 04/27/2022] [Indexed: 11/18/2022]
Abstract
Objective To investigate the value of guidewire-assisted reduction technology (which increases the stiffness of a catheter through the use of a guidewire, thereby protecting the puncture point and distal vein from breakage) combined with postural reduction for malpositioned catheters in the internal jugular vein during peripherally inserted central venous catheter catheterisation. Methods From January 2015 to August 2020, we used ultrasound to perform guided puncture and monitoring. We identified the tip of the catheter as malpositioned in the internal jugular vein in 99 patients during the catheterisation process. These patients were divided randomly into a control group and an experimental group. In the control group, 43 cases received guidewire-assisted reduction technology, while in the experimental group, 56 patients received guidewire-assisted reduction technology combined with an upright posture. This study compared the efficacy of these two methods. Results The results showed that 30 catheters were reduced successfully in the control group, with a success rate of 69.8%. In the experimental group, 53 cases were successfully reduced, with a success rate of 94.6%. The catheter reduction success rate in the experimental group was significantly higher than in the control group; this was a statistically significant difference (P=0.001). Conclusion Guidewire-assisted reduction technology combined with postural reduction can improve the success rate of the reduction of malpositioned catheters in the internal jugular vein.
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Affiliation(s)
- Feng-Xian Li
- Department of Oncology Beijing Shijingshan Hospital, Capital Medical University, Beijing 100043, China
| | - Yan-Ping Li
- Department of Oncology Beijing Shijingshan Hospital, Capital Medical University, Beijing 100043, China
| | - Hong-Yang Zhang
- Department of Oncology Beijing Shijingshan Hospital, Capital Medical University, Beijing 100043, China
| | - Mei-Jing Tian
- Department of Oncology Beijing Shijingshan Hospital, Capital Medical University, Beijing 100043, China
| | - Huan-Huan Gao
- Department of Oncology Beijing Shijingshan Hospital, Capital Medical University, Beijing 100043, China
| | - Gui-Juan Zhang
- Department of Oncology Beijing Shijingshan Hospital, Capital Medical University, Beijing 100043, China
| | - Peng Su
- Department of Oncology Beijing Shijingshan Hospital, Capital Medical University, Beijing 100043, China
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8
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SVEC D, CZIPPELOVA B, CERNANOVA KROHOVA J, MAZGUTOVA N, WISZT R, TURIANIKOVA Z, MATUSKOVA L, JAVORKA M. Short-Term Arterial Compliance Changes in the Context of Systolic Blood Pressure Influence. Physiol Res 2021; 70:S339-S348. [DOI: 10.33549/physiolres.934838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Arterial compliance (C) is a complex parameter influencing ventricular-arterial coupling depending on structural (arterial wall remodeling) and functional (blood pressure, smooth muscles tone) changes. Based on Windkessel model, C can be calculated as the ratio of a time constant Tau characterizing diastolic blood pressure decay and total peripheral resistance (TPR). The aim of this study was to assess changes of C in the context of systolic arterial pressure (SAP) perturbations during four physiological states (supine rest, head-up tilt, supine recovery, mental arithmetic). In order to compare pressure independent changes of C a new index of C120 was proposed predicting C value at 120 mm Hg of SAP. Eighty-one healthy young subjects (48 f, average age 18.6 years) were examined. Hemodynamic parameters were measured beat-to-beat using volume-clamp photoplethysmographic method and impedance cardiography. We observed that C was strongly related to SAP values on the beat-to-beat time scale. Interestingly, C120 decreased significantly during stress phases. In conclusion, potential changes of SAP should be considered when measuring C. Arterial compliance changes in the opposite direction to TPR pointing towards influence of vascular tone changes on its value.
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Affiliation(s)
- D SVEC
- Department of Physiology, Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Martin, Slovak Republic
| | - B CZIPPELOVA
- Department of Physiology, Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Martin, Slovak Republic
| | - Jana CERNANOVA KROHOVA
- Department of Physiology, Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Martin, Slovak Republic
| | - N MAZGUTOVA
- Department of Physiology, Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Martin, Slovak Republic
| | - R WISZT
- Department of Physiology, Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Martin, Slovak Republic
| | - Z TURIANIKOVA
- Department of Physiology, Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Martin, Slovak Republic
| | - L MATUSKOVA
- Department of Physiology, Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Martin, Slovak Republic
| | - M JAVORKA
- Department of Physiology, Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Martin, Slovak Republic
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9
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Abstract
Arterial compliance is an important cardiovascular parameter characterizing mechanical and structural properties of arteries and significantly influencing ventricular-arterial coupling. Decreased arterial compliance is associated with several physiological states and pathological processes. Furthermore, arterial compliance is influenced by other cardiovascular parameters even at short time scales. Today, there are numerous noninvasive methods of estimation arterial compliance in vivo introducing some level of confusion about selection of the best method for particular application and measurement setting. In this review, the most common noninvasive methods of arterial compliance estimation are summarized, discussed and categorized. Finally, interpretation of estimated arterial compliance in the context of other possible confounders is discussed.
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Affiliation(s)
- D Švec
- Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Department of Physiology, Martin, Slovakia.
| | - M Javorka
- Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Department of Physiology, Martin, Slovakia
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10
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Blood flow restriction in the presence or absence of muscle contractions does not preserve vasculature structure and function following 14-days of limb immobilization. Eur J Appl Physiol 2021; 121:2437-2447. [PMID: 34002326 DOI: 10.1007/s00421-021-04715-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 05/07/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE Limb immobilization causes local vasculature to experience detrimental adaptations. Simple strategies to increase blood flow (heating, fidgeting) successfully prevent acute (≤ 1 day) impairments; however, none have leveraged the hyperemic response over prolonged periods (weeks) mirroring injury rehabilitation. Throughout a 14-day unilateral limb immobilization, we sought to preserve vascular structure and responsiveness by repeatedly activating a reactive hyperemic response via blood flow restriction (BFR) and amplifying this stimulus by combining BFR with electric muscle stimulation (EMS). METHODS Young healthy adults (M:F = 14:17, age = 22.4 ± 3.7 years) were randomly assigned to control, BFR, or BFR + EMS groups. BFR and BFR + EMS groups were treated for 30 min twice daily (3 × 10 min ischemia-reperfusion cycles; 15% maximal voluntary contraction EMS), 5 days/week (20 total sessions). Before and after immobilization, artery diameter, flow-mediated dilation (FMD) and blood flow measures were collected in the superficial femoral artery (SFA). RESULTS Following immobilization, there was less retrograde blood velocity (+ 1.8 ± 3.6 cm s-1, P = 0.01), but not retrograde shear (P = 0.097). All groups displayed reduced baseline and peak SFA diameter following immobilization (- 0.46 ± 0.41 mm and - 0.43 ± 0.39 mm, P < 0.01); however, there were no differences by group or across time for FMD (% diameter change, shear-corrected, or allometrically scaled) nor microvascular function assessed by peak flow capacity. CONCLUSION Following immobilization, our results reveal (1) neither BFR nor BFR + EMS mitigate artery structure impairments, (2) intervention-induced shear stress did not affect vascular function assessed by FMD, and (3) retrograde blood velocity is reduced at rest offering potential insight to mechanisms of flow regulation. In conclusion, BFR appears insufficient as a treatment strategy for preventing macrovascular dysfunction during limb immobilization.
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Heinbockel TC, Craighead DH. Case studies in physiology: Impact of a long-distance hike on the Pacific Crest Trail on arterial function and body composition in a highly fit young male. Physiol Rep 2021; 9:e14767. [PMID: 33661563 PMCID: PMC7931801 DOI: 10.14814/phy2.14767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 01/27/2021] [Accepted: 01/27/2021] [Indexed: 11/24/2022] Open
Abstract
The Pacific Crest Trail (PCT) is a 4265‐km hiking trail that extends from the US‐Mexican border to the US‐Canadian border through the mountain ranges of western North America. Individuals who hike the entire length of the trail in one season (4–6 months) perform long daily exercise durations while exposed to extreme environmental temperatures, high altitudes, intense solar radiation, and the consumption of calorie‐rich, nutrient‐poor diets. This case study reports changes in arterial function and body composition in a subject before and after a 112‐day long‐distance hike of the PCT. Brachial artery flow‐mediated dilation, a measure of vascular endothelial function, decreased from: 6.97% to 5.00%. Carotid‐femoral pulse wave velocity, a measure of aortic stiffness, increased from 5.39 to 5.76 m/s. Dual‐energy x‐ray absorptiometry scans detected no major changes in total‐body bone mineral density, fat mass, or lean mass, although there were minor, unfavorable changes in some subregions of the body. It is important for individuals completing a long‐distance hike to be aware of the potential deleterious changes associated with large volumes of exercise and consuming a high‐calorie, low‐quality diet.
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Affiliation(s)
- Thomas C Heinbockel
- Department of Integrative Physiology, The University of Colorado Boulder, Boulder, CO, USA
| | - Daniel H Craighead
- Department of Integrative Physiology, The University of Colorado Boulder, Boulder, CO, USA
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Nardone M, Floras JS, Millar PJ. Sympathetic neural modulation of arterial stiffness in humans. Am J Physiol Heart Circ Physiol 2020; 319:H1338-H1346. [PMID: 33035441 DOI: 10.1152/ajpheart.00734.2020] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Elevated large-artery stiffness is recognized as an independent predictor of cardiovascular and all-cause mortality. The mechanisms responsible for such stiffening are incompletely understood. Several recent cross-sectional and acute experimental studies have examined whether sympathetic outflow, quantified by microneurographic measures of muscle sympathetic nerve activity (MSNA), can modulate large-artery stiffness in humans. A major methodological challenge of this research has been the capacity to evaluate the independent neural contribution without influencing the dynamic blood pressure dependence of arterial stiffness. The focus of this review is to summarize the evidence examining 1) the relationship between resting MSNA and large-artery stiffness, as determined by carotid-femoral pulse wave velocity or pulse wave reflection characteristics (i.e., augmentation index) in men and women; 2) the effects of acute sympathoexcitatory or sympathoinhibitory maneuvers on carotid-femoral pulse wave velocity and augmentation index; and 3) the influence of sustained increases or decreases in sympathetic neurotransmitter release or circulating catecholamines on large-artery stiffness. The present results highlight the growing evidence that the sympathetic nervous system is capable of modulating arterial stiffness independent of prevailing hemodynamics and vasomotor tone.
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Affiliation(s)
- Massimo Nardone
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - John S Floras
- University Health Network and Mount Sinai Hospital, Division of Cardiology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada.,Toronto General Hospital Research Institute, Toronto, Ontario, Canada
| | - Philip J Millar
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada.,Toronto General Hospital Research Institute, Toronto, Ontario, Canada
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Alansare AB, Kowalsky RJ, Jones MA, Perdomo SJ, Stoner L, Gibbs BB. The Effects of a Simulated Workday of Prolonged Sitting on Seated versus Supine Blood Pressure and Pulse Wave Velocity in Adults with Overweight/Obesity and Elevated Blood Pressure. J Vasc Res 2020; 57:355-366. [PMID: 32937620 PMCID: PMC7666078 DOI: 10.1159/000510294] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 07/20/2020] [Indexed: 12/14/2022] Open
Abstract
We evaluated the effects of a simulated workday of prolonged sitting on blood pressure (BP) and pulse wave velocity (PWV) and examined whether posture (seated vs. supine) affected responses. Participants (n = 25) were adults, with overweight/obesity and elevated BP, and performed seated desk work for 7.5 h. BP and PWV were measured in seated and supine postures at baseline (7:15 a.m.), midday (12:05 p.m.), and afternoon (4:45 p.m.). Generalized linear mixed models evaluated the effects of prolonged sitting on BP and PWV within each posture and interactions by posture and sex. In the recommended postures, seated BP and supine carotid-femoral pulse wave velocity (cfPWV) and carotid-ankle pulse wave velocity (caPWV), but not carotid-radial pulse wave velocity (crPWV), significantly increased over the simulated seated workday (all p < 0.05; effect sizes [d] ranged from 0.25 to 0.44). Whilst no posture-by-time interactions were observed (p > 0.05), BP, caPWV, and crPWV were higher when seated versus supine (main effects of posture p < 0.05; d ranged from 0.30 to 1.04). Exploratory analysis revealed that females had greater seated BP responses (p for interaction <0.05); seated PWV and supine BP and PWV responses were similar by sex (p for interaction >0.05). A simulated workday of prolonged sitting increased seated BP and supine cfPWV and caPWV, and posture minimally influenced these responses. These results add to the evidence suggesting a deleterious effect of prolonged sitting on cardiovascular health.
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Affiliation(s)
- Abdullah Bandar Alansare
- Department of Health and Physical Activity, College of Education, University of Pittsburgh, Pittsburgh, Pennsylvania, USA,
- Department of Exercise Physiology, College of Sport Sciences and Physical Activity, King Saud University, Riyadh, Saudi Arabia,
| | - Robert J Kowalsky
- Department of Health and Kinesiology, College of Education and Human Performance, Texas A&M University-Kingsville, Kingsville, Texas, USA
| | - Melissa A Jones
- Department of Health and Physical Activity, College of Education, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Sophy J Perdomo
- Department of Health and Physical Activity, College of Education, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Lee Stoner
- Department of Sport and Exercise, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Bethany Barone Gibbs
- Department of Health and Physical Activity, College of Education, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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