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Qian C, Ye F, Li J, Tseng P, Khine M. Wireless and Battery-Free Sensor for Interstitial Fluid Pressure Monitoring. SENSORS (BASEL, SWITZERLAND) 2024; 24:4429. [PMID: 39065827 PMCID: PMC11280719 DOI: 10.3390/s24144429] [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: 05/31/2024] [Revised: 07/03/2024] [Accepted: 07/04/2024] [Indexed: 07/28/2024]
Abstract
Congestive heart failure (CHF) is a fatal disease with progressive severity and no cure; the heart's inability to adequately pump blood leads to fluid accumulation and frequent hospital readmissions after initial treatments. Therefore, it is imperative to continuously monitor CHF patients during its early stages to slow its progression and enable timely medical interventions for optimal treatment. An increase in interstitial fluid pressure (IFP) is indicative of acute CHF exacerbation, making IFP a viable biomarker for predicting upcoming CHF if continuously monitored. In this paper, we present an inductor-capacitor (LC) sensor for subcutaneous wireless and continuous IFP monitoring. The sensor is composed of inexpensive planar copper coils defined by a simple craft cutter, which serves as both the inductor and capacitor. Because of its sensing mechanism, the sensor does not require batteries and can wirelessly transmit pressure information. The sensor has a low-profile form factor for subcutaneous implantation and can communicate with a readout device through 4 layers of skin (12.7 mm thick in total). With a soft silicone rubber as the dielectric material between the copper coils, the sensor demonstrates an average sensitivity as high as -8.03 MHz/mmHg during in vitro simulations.
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Affiliation(s)
- Chengyang Qian
- Department of Biomedical Engineering, Henry Samueli School of Engineering, University of California Irvine, Irvine, CA 92697, USA (J.L.)
| | - Fan Ye
- Department of Electrical Engineering and Computer Science, Henry Samueli School of Engineering, University of California Irvine, Irvine, CA 92697, USA (P.T.)
| | - Junye Li
- Department of Biomedical Engineering, Henry Samueli School of Engineering, University of California Irvine, Irvine, CA 92697, USA (J.L.)
| | - Peter Tseng
- Department of Electrical Engineering and Computer Science, Henry Samueli School of Engineering, University of California Irvine, Irvine, CA 92697, USA (P.T.)
| | - Michelle Khine
- Department of Biomedical Engineering, Henry Samueli School of Engineering, University of California Irvine, Irvine, CA 92697, USA (J.L.)
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Abdin A, Anker SD, Cowie MR, Filippatos GS, Ponikowski P, Tavazzi L, Schöpe J, Wagenpfeil S, Komajda M, Böhm M. Associations between baseline heart rate and blood pressure and time to events in heart failure with reduced ejection fraction patients: Data from the QUALIFY international registry. Eur J Heart Fail 2023; 25:1985-1993. [PMID: 37661847 DOI: 10.1002/ejhf.3023] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/25/2023] [Accepted: 08/28/2023] [Indexed: 09/05/2023] Open
Abstract
AIMS A high resting heart rate (RHR) and low systolic blood pressure (SBP) are a risk factor and a risk indicator, respectively, for poor heart failure (HF) outcomes. This analysis evaluated the associations between baseline RHR and SBP with outcomes and treatment patterns in patients with HF and reduced ejection fraction (HFrEF) in the QUALIFY (QUality of Adherence to guideline recommendations for LIFe-saving treatment in heart failure surveY) international registry. METHODS AND RESULTS Between September 2013 and December 2014, 7317 HFrEF patients with a previous HF hospitalization within 1-15 months were enrolled in the QUALIFY registry. Complete follow-up data were available for 5138 patients. The relationships between RHR and SBP and outcomes were assessed using a Cox proportional hazards model and were analysed according to baseline values as high RHR (H-RHR) ≥75 bpm versus low RHR (L-RHR) <75 bpm and high SBP (H-SBP) ≥110 mmHg versus low SBP (L-SBP) <110 mmHg and analysed according to each of the following four phenotypes: H-RHR/L-SBP, L-RHR/L-SBP, H-RHR/H-SBP and L-RHR/H-SBP (reference group). Compared to the reference group, H-RHR/L-SBP was associated with the worst outcomes for the combined primary endpoint of cardiovascular death and HF hospitalization (hazard ratio [HR] 1.83, 95% confidence interval [CI] 1.51-2.21, p < 0.001), cardiovascular death (HR 2.70, 95% CI 1.69-4.33, p < 0.001), and HF hospitalization (HR 1.62, 95% CI 1.30-2.01, p < 0.001). Low-risk patients with L-RHR/H-SBP achieved more frequently ≥50% of target doses of angiotensin-converting enzyme inhibitors (ACEIs) and beta-blockers (BBs) than the other groups. However, 48% and 46% of low-risk patients were not well treated with ACEIs and BBs, respectively (≤50% of target dose or no treatment). CONCLUSION In patients with HFrEF and recent hospitalization, elevated RHR and lower SBP identify patients at increased risk for cardiovascular endpoints. While SBP and RHR are often recognized as barriers that deter physicians from treating with high doses of recommended drugs, they are not the only reason leaving many patients suboptimally treated.
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Affiliation(s)
- Amr Abdin
- Department of Internal Medicine III, Cardiology, Angiology, Intensive Care Medicine, Saarland University, Saarland University Medical Center, Homburg, Germany
| | - Stefan D Anker
- Department of Cardiology & Berlin Institute of Health Center for Regenerative Therapies (BCRT), German Center for Cardiovascular Research (DZHK), partner site Berlin, Charité-Universitätsmedizin Berlin (Campus CVK), Berlin, Germany
| | - Martin R Cowie
- School of Cardiovascular Medicine, Faculty of Life Sciences & Medicine, King's College London (Royal Brompton Hospital), London, UK
| | - Gerasimos S Filippatos
- Department of Cardiology, National and Kapodistrian University of Athens, School of Medicine, Athens University Hospital Attikon, Athens, Greece
| | - Piotr Ponikowski
- Center for Heart Diseases, University Hospital, Medical University, Wroclaw, Poland
| | - Luigi Tavazzi
- Maria Cecilia Hospital, GVM Care & Research, Cotignola, Italy
| | - Jakob Schöpe
- Institute for Medical Biometry, Epidemiology and Medical Informatics, Saarland University, Campus Homburg, Saarbrücken, Germany
| | - Stefan Wagenpfeil
- Institute for Medical Biometry, Epidemiology and Medical Informatics, Saarland University, Campus Homburg, Saarbrücken, Germany
| | - Michel Komajda
- Department of Cardiology, Hospital Saint Joseph, Paris, France
| | - Michael Böhm
- Department of Internal Medicine III, Cardiology, Angiology, Intensive Care Medicine, Saarland University, Saarland University Medical Center, Homburg, Germany
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Comparison of Hemodynamic Response between Patients with Systolic Heart Failure Differing in Serum Aldosterone Concentrations during and after a 6-Minute Walk Test. J Clin Med 2023; 12:jcm12031007. [PMID: 36769655 PMCID: PMC9917580 DOI: 10.3390/jcm12031007] [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: 12/21/2022] [Revised: 01/16/2023] [Accepted: 01/24/2023] [Indexed: 02/03/2023] Open
Abstract
Aldosterone regulates hemodynamics, including blood pressure (BP), and is involved in the development and progression of cardiovascular diseases, including systolic heart failure (HF). While exercise intolerance is typical for HF, neither BP nor heart rate (HR) have specific characteristics in HF patients. This study compares BP and HR profiles during and after standardized exercise between patients with systolic HF with either lower or higher aldosterone concentrations. We measured BP and HR in 306 ambulatory adults with systolic HF (left ventricular ejection fraction (LVEF) <50%) during and after a 6 min walk test (6MWT). All patients underwent a resting transthoracic echocardiography, and venous blood samples were collected for biochemical analyses. The patients were also divided into tertiles of serum aldosterone concentration: T1 (<106 pg/mL), T2 (106 and 263 pg/mL) and T3 (>263 pg/mL), respectively. Individuals from T1 and T2 were combined into T1-T2 as the reference group for comparisons with patients from T3. The individuals from T3 had significantly lower systolic, mean and diastolic BPs at rest, at the end and at 1 and 3 min post-6MWT recovery, as well as a more dilated left atrium and right ventricle alongside a higher concentration of N-terminal pro-B-type natriuretic peptide (NT-proBNP). Higher serum aldosterone concentration in HF patients with an LVEF < 50% is associated with a lower 6MWT BP but not an HR profile.
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Shoaei Matin S, Shidfar F, Naderi N, Amin A, Hosseini-Baharanchi FS, Dehnad A. The Effect of Synbiotic Consumption on Serum NTproBNP, hsCRP and Blood Pressure in Patients With Chronic Heart Failure: A Randomized, Triple-Blind, Controlled Trial. Front Nutr 2022; 8:822498. [PMID: 35498054 PMCID: PMC9043653 DOI: 10.3389/fnut.2021.822498] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 12/24/2021] [Indexed: 11/29/2022] Open
Abstract
Background In recent years, there has been a positive attitude toward gut microbiota and its effect on cardiovascular diseases, including heart failure. Objective The purpose of this study was to evaluate the effect of synbiotics on left ventricular hypertrophy by measuring NT-proBNP, and their effect on blood pressure and hsCRP as an inflammatory biomarker in patients with chronic heart failure. Design In this triple-blind randomized clinical trial, 90 eligible patients were included in the study. They were randomly assigned to receive one capsule (500 mg) of synbiotics or placebo per day for 10 weeks. NTproBNP, hsCRP and blood pressure were measured at the beginning and end of the study. Statistical analysis was performed on 80 patients by using SPSS 24, and p < 0.05 as statistically significant. Result At the end of the study, the level of NT-proBNP decreased significantly in the synbiotic group compared to the placebo group (r = −256.55; P = 0.04). However, hsCRP increased in both groups as compared to the beginning of the study, but only in the placebo group the increase in hsCRP was significant (P = 0.01). The results showed that the changes in hs-CRP was not significant between the two groups. No statistically significant differences were observed in systolic and diastolic blood pressure between the two groups at the end of the intervention. Conclusion Synbiotics have favorable effect on cardiac hypertrophy index (NT-proBNP). Although the inflammatory factor increased in both groups, the significant increase in hsCRP in the placebo group could indicate the beneficial effects of synbiotics on the inflammatory status of these patients. Clinical Trial Registration https://en.irct.ir/user/trial/42905/view, identifier: IRCT20091114002709N52.
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Affiliation(s)
- Shakiba Shoaei Matin
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Farzad Shidfar
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
- *Correspondence: Farzad Shidfar
| | - Nasim Naderi
- Rajaie Cardiovascular, Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Ahmad Amin
- Rajaie Cardiovascular, Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Sadat Hosseini-Baharanchi
- Department of Biostatistics, Minimally Invasive Surgery Research Center, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Afsaneh Dehnad
- Department of Medical Education, Center for Educational Research in Medical Sciences (CERMS), School of Health Management and Information Sciences, Iran University of Medical Sciences, Tehran, Iran
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Schmitt J, Wenzel B, Brüsehaber B, Anguera I, de Sousa J, Nölker G, Bulava A, Marques P, Hatala R, Golovchiner G, Meyhöfer J, Ilan M. Impact of lockdown during COVID-19 pandemic on physical activity and arrhythmia burden in heart failure patients. Pacing Clin Electrophysiol 2022; 45:471-480. [PMID: 34997979 DOI: 10.1111/pace.14443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 11/26/2021] [Accepted: 01/02/2022] [Indexed: 12/25/2022]
Abstract
BACKGROUND Restricted outdoor activity during COVID-19 related lockdown may accelerate heart failure (HF) progression and thereby increase cardiac arrhythmias. We analyzed the impact of March/April 2020 lockdown on physical activity and arrhythmia burden in HF patients treated with cardiac resynchronization therapy (CRT) devices with daily, automatic remote monitoring (RM) function. METHODS The study cohort included 405 HF patients enrolled in Observation of Clinical Routine Care for Heart Failure Patients Implanted with BIOTRONIK CRT Devices (BIO|STREAM.HF) registry in 16 countries, who had left ventricular ejection fraction (LVEF) ≤40% (mean 28.2 ± 6.6%) and NYHA class II/III/IV (47.9%/49.6%/2.5%) before CRT pacemaker/defibrillator implantation. The analyzed RM data comprised physical activity detected by accelerometer, mean heart rate and nocturnal rate, PP variability, percentage of biventricular pacing, atrial high rate episode (AHRE) burden, ventricular extrasystoles and tachyarrhythmias, defibrillator shocks, and number of implant interrogations (i.e., follow-ups). Intraindividual differences in RM parameters before (4-week period) versus during (4-week period) lockdown were tested for statistical significance and independent predictors were identified. RESULTS There was a significant relative change in activity (mean -6.5%, p < .001), AHRE burden (+17%, p = .013), and follow-up rate (-75%, p < .001) during lockdown, with no significant changes in other RM parameters. Activity decreased by ≥8 min/day in 46.5% of patients; predictors were higher LVEF, lower NYHA class, no defibrillator indication, and more activity before lockdown. AHRE burden increased by ≥17 min/day in 4.7% of patients; predictors were history of atrial fibrillation, higher LVEF, higher body mass index, and activity decrease during lockdown. CONCLUSION Unfavorable changes in physical activity, AHRE burden, and follow-up rate were observed during lockdown, but not in ventricular arrhythmia.
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Affiliation(s)
- Jörn Schmitt
- University Hospital Giessen and Marburg, Giessen, Germany
| | | | | | | | | | | | - Alan Bulava
- Ceske Budejovice Hospital, Faculty of Health and Social Sciences, University of South Bohemia in Ceske Budejovice, Ceske Budejovice, Czech Republic
| | | | - Robert Hatala
- National Institute of Cardiovascular Diseases, Bratislava, Slovakia
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- University Hospital Giessen and Marburg, Giessen, Germany
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Barszczyk A, Zhou W, Lee K. AIM and Transdermal Optical Imaging. Artif Intell Med 2022. [DOI: 10.1007/978-3-030-64573-1_250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Senarath S, Fernie G, Roshan Fekr A. Influential Factors in Remote Monitoring of Heart Failure Patients: A Review of the Literature and Direction for Future Research. SENSORS 2021; 21:s21113575. [PMID: 34063825 PMCID: PMC8196679 DOI: 10.3390/s21113575] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 12/20/2022]
Abstract
With new advances in technology, remote monitoring of heart failure (HF) patients has become increasingly prevalent and has the potential to greatly enhance the outcome of care. Many studies have focused on implementing systems for the management of HF by analyzing physiological signals for the early detection of HF decompensation. This paper reviews recent literature exploring significant physiological variables, compares their reliability in predicting HF-related events, and examines the findings according to the monitored variables used such as body weight, bio-impedance, blood pressure, heart rate, and respiration rate. The reviewed studies identified correlations between the monitored variables and the number of alarms, HF-related events, and/or readmission rates. It was observed that the most promising results came from studies that used a combination of multiple parameters, compared to using an individual variable. The main challenges discussed include inaccurate data collection leading to contradictory outcomes from different studies, compliance with daily monitoring, and consideration of additional factors such as physical activity and diet. The findings demonstrate the need for a shared remote monitoring platform which can lead to a significant reduction of false alarms and help in collecting reliable data from the patients for clinical use especially for the prevention of cardiac events.
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Affiliation(s)
- Sashini Senarath
- The Kite Research Institute, Toronto Rehabilitation Institute—University Health Network, University of Toronto, Toronto, ON M5G 2A2, Canada; (G.F.); (A.R.F.)
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
- Correspondence:
| | - Geoff Fernie
- The Kite Research Institute, Toronto Rehabilitation Institute—University Health Network, University of Toronto, Toronto, ON M5G 2A2, Canada; (G.F.); (A.R.F.)
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
| | - Atena Roshan Fekr
- The Kite Research Institute, Toronto Rehabilitation Institute—University Health Network, University of Toronto, Toronto, ON M5G 2A2, Canada; (G.F.); (A.R.F.)
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
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AIM and Transdermal Optical Imaging. Artif Intell Med 2021. [DOI: 10.1007/978-3-030-58080-3_250-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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