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Boden K, Pongratanakul P, Vogel J, Willemsen N, Jülke EM, Balitzki J, Tinel H, Truebel H, Dinh W, Mondritzki T. Telemetric long-term assessment of autonomic function in experimental heart failure. J Pharmacol Toxicol Methods 2023; 124:107480. [PMID: 37979811 DOI: 10.1016/j.vascn.2023.107480] [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: 08/06/2023] [Revised: 11/08/2023] [Accepted: 11/13/2023] [Indexed: 11/20/2023]
Abstract
Despite medical advances in the treatment of heart failure (HF), mortality remains high. It has been shown that alterations of the autonomic-nervous-system (ANS) are associated with HF progression and increased mortality. Preclinical models are required to evaluate the effectiveness of novel treatments modulating the autonomic imbalance. However, there are neither standard models nor diagnostic methods established to measure sympathetic and parasympathetic outflow continuously. Digital technologies might be a reliable tool for continuous assessment of autonomic function within experimental HF models. Telemetry devices and pacemakers were implanted in beagle dogs (n = 6). HF was induced by ventricular pacing. Cardiac hemodynamics, plasma catecholamines and parameter describing the ANS ((heart rate variability (HRV), deceleration capacity (DC), and baroreflex sensitivity (BRS)) were continuously measured at baseline, during HF conditions and during recovery phase. The pacing regime led to the expected depression in cardiac hemodynamics. Telemetric assessment of the ANS function showed a significant decrease in Total power, DC, and Heart rate recovery, whereas BRS was not significantly affected. In contrast, plasma catecholamines, revealing sympathetic activity, showed only a significant increase in the recovery phase. A precise diagnostic of the ANS in the context of HF is becoming increasingly important in experimental models. Up to now, these models have shown many limitations. Here we present the continuous assessment of the autonomic function in the progression of HF. We could demonstrate the advantage of highly resolved ANS measurement by HR and BP derived parameters due to early detection of an autonomic imbalance in the progression of HF.
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Affiliation(s)
- Katharina Boden
- Bayer AG, Wuppertal, Germany; University of Witten/Herdecke, Witten, Germany
| | | | - Julia Vogel
- University of Witten/Herdecke, Witten, Germany; Clinic for Cardiology and Angiology, West-German Heart and Vascular Center, Faculty of Medicine, University Duisburg-Essen, Germany
| | - Nicola Willemsen
- Bayer AG, Wuppertal, Germany; University of Duisburg-, Essen, Germany
| | | | - Jakob Balitzki
- Bayer AG, Wuppertal, Germany; Hannover Medical School, Hannover, Germany
| | | | | | - Wilfried Dinh
- Bayer AG, Wuppertal, Germany; University of Witten/Herdecke, Witten, Germany; Department of Cardiology, HELIOS Clinic Wuppertal, University Hospital Witten/Herdecke, Wuppertal, Germany
| | - Thomas Mondritzki
- Bayer AG, Wuppertal, Germany; University of Witten/Herdecke, Witten, Germany.
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Liu H, Zhan P, Shi J, Wang G, Wang B, Wang W. A refined method of quantifying deceleration capacity index for heart rate variability analysis. Biomed Eng Online 2018; 17:184. [PMID: 30563515 PMCID: PMC6299532 DOI: 10.1186/s12938-018-0618-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 12/13/2018] [Indexed: 11/14/2022] Open
Abstract
Background Phase-rectified signal averaging (PRSA) was often applied to assess the cardiac vagal modulation. Despite its broad use, this method suffers from the confounding effects of anomalous variants of sinus rhythm. This study aimed to improve the original PRSA method in deceleration capacity (DC) quantification. Methods The refined deceleration capacity (DCref) was calculated by excluding from non-vagally mediated abnormal variants of sinus rhythms. Holter recordings from 202 healthy subjects and 51 patients with end-stage renal disease (ESRD) have been used for validity. The DCref was compared to original DC (DCorg) by the area under receiver operating characteristic curve. Results Experimental results demonstrate that the original and refined DCs calculated from 24-h, 2-h, and 30-min Holter recordings are significantly lower in patients with ESRD than those in the healthy group. In receiver operating characteristic curve analysis, the DCref provides better performance than the DCorg in distinguishing between the patients with ESRD and healthy control subjects. Furthermore, the refined PRSA technique enhances the low frequency and attenuates high frequency components for spectral analysis in ESRD patients. Conclusions The DCref appears to reduce the influence of non-vagally mediated abnormal variants of sinus rhythm and highlighting the pathological influence. DCref, especially assessed from short-term electrocardiography recordings, may be complementary to existing autonomic function assessment, risk stratification, and efficacy prediction strategies.
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Affiliation(s)
- Hongyun Liu
- Department of Biomedical Engineering, Chinese PLA General Hospital, Room_105, South Ward Building, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China.,Center of Medical Device R & D and Clinical Evaluation, Chinese PLA General Hospital, Beijing, 100853, China
| | - Ping Zhan
- Center of Medical Device R & D and Clinical Evaluation, Chinese PLA General Hospital, Beijing, 100853, China
| | - Jinlong Shi
- Department of Biomedical Engineering, Chinese PLA General Hospital, Room_105, South Ward Building, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China.,Center of Medical Device R & D and Clinical Evaluation, Chinese PLA General Hospital, Beijing, 100853, China
| | - Guojing Wang
- Department of Biomedical Engineering, Chinese PLA General Hospital, Room_105, South Ward Building, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China.,Center of Medical Device R & D and Clinical Evaluation, Chinese PLA General Hospital, Beijing, 100853, China
| | - Buqing Wang
- Department of Biomedical Engineering, Chinese PLA General Hospital, Room_105, South Ward Building, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
| | - Weidong Wang
- Department of Biomedical Engineering, Chinese PLA General Hospital, Room_105, South Ward Building, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China. .,Center of Medical Device R & D and Clinical Evaluation, Chinese PLA General Hospital, Beijing, 100853, China.
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Deceleration and acceleration capacities of heart rate in patients with drug-resistant epilepsy. Clin Auton Res 2018; 29:195-204. [PMID: 30328033 DOI: 10.1007/s10286-018-0569-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 10/08/2018] [Indexed: 01/03/2023]
Abstract
OBJECTIVE Epilepsy and seizures can have dramatic effects on cardiac function. The aim of the present study was to investigate deceleration capacity, acceleration capacity and their 24-h fluctuations of heart rate variability in patients with drug-resistant epilepsy. METHODS Deceleration capacity, acceleration capacity of heart rate and their 24-h dynamics derived from the phase rectified signal averaging method as well as traditional measures were analyzed in 39 patients with drug-resistant epilepsy and 33 healthy control subjects using 24-h electrocardiogram recordings. The discriminatory power of heart rate variability measures were validated by assessment of the area under the receiver operating characteristic curve. Net reclassification improvement and integrated discrimination improvement models were also estimated. RESULTS Both deceleration capacity and absolute values of acceleration capacity were significantly lower in patients with drug-resistant epilepsy. The abnormal suppression of absolute deceleration capacity and acceleration capacity values were observed throughout the 24-h recording time (peaked at about 3 to 5 A.M.). Deceleration capacity had the greatest discriminatory power to differentiate the patients from the healthy controls. Moreover, in both net reclassification improvement and integrated discrimination improvement models, the combination of acceleration capacity or deceleration capacity with traditional heart rate variability measures has greater discriminatory power than any of the single heart rate variability features. INTERPRETATION Drug-resistant epilepsy was associated with a significant inhibition of vagal modulation of heart rate, which was more pronounced during the night than during the day. These findings indicate that phase rectified signal averaging method may serve as a complementary approach for characterizing and understanding the neuro-pathophysiology in epilepsy, and may provide a new clue to sudden unexpected death in epilepsy.
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Sen J, McGill D. Fractal analysis of heart rate variability as a predictor of mortality: A systematic review and meta-analysis. CHAOS (WOODBURY, N.Y.) 2018; 28:072101. [PMID: 30070502 DOI: 10.1063/1.5038818] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 07/10/2018] [Indexed: 05/21/2023]
Abstract
Previous studies have suggested benefits of applying fractal analysis to intervals between R waves in electrocardiography as an additional prognostic marker. The aim of this study was to investigate whether fractal analysis can provide an independent predictor of cardiac mortality or all-cause mortality. Prognostic cohort studies reporting fractal heart rate variability results from 24-h Holter monitor recordings were selected for comparison. Populations were subdivided into four groups-post-myocardial infarction, left ventricular dysfunction, other cardiac, and non-cardiac patients-and analysed using ANOVA, Forest plots (using pooled mean difference), and Funnel plots. The most significant mean differences were recorded in short-term fractal self-similarity (α1) (-0.17, 95% CI [-0.21, -0.13], p < 0.00001) and the traditional measure called standard deviation of NN intervals (SDNN) (-13.31, 95% CI [-18.89, -7.73], p < 0.00001) between the deceased and survivor groups. Fractal measures of long-term fractal self-similarity (α2), 1/f scaling (β), and traditional heart rate variability measures of high frequency to low frequency ratio show promise. This review indicated that fractal measure α1 and traditional measure SDNN could be potential predictors of mortality, but require further assessment to determine appropriate thresholds for clinical significance and additional targeted prognostic studies to properly define their applicability as prognostic markers. Therefore, clinicians should interpret fractal and traditional measures with caution since such measures have yet to be fully described as biomarkers for clinical application.
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Affiliation(s)
- Jonathan Sen
- Cardiology Research Unit, University Hospital Geelong, Barwon Health, PO Box 281, Geelong, Victoria 3220, Australia
| | - Darryl McGill
- Cardiology Department, Canberra Hospital, Yamba Drive, Garran, Australian Capital Territory 2605, Australia
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Pan Q, Zhou G, Wang R, Yu Y, Li F, Fang L, Yan J, Ning G. The degree of heart rate asymmetry is crucial for the validity of the deceleration and acceleration capacity indices of heart rate: A model-based study. Comput Biol Med 2016; 76:39-49. [PMID: 27392228 DOI: 10.1016/j.compbiomed.2016.06.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 05/24/2016] [Accepted: 06/20/2016] [Indexed: 11/20/2022]
Abstract
The deceleration capacity (DC) and acceleration capacity (AC) of heart rate are a pair of indices used for evaluating the autonomic nervous system (ANS). We assessed the role of heart rate asymmetry (HRA) in defining the relative performance of DC and AC using a mathematical model, which is able to generate a realistic RR interval (RRI) time series with controlled ANS states. The simulation produced a set of RRI series with random sympathetic and vagal activities. The multi-scale DCs and ACs were computed from the RRI series, and the correlation of DC and AC with the ANS functions was analyzed to evaluate the performance of the indices. In the model, the HRA level was modified by changing the inspiration/expiration (I/E) ratio to examine the influence of HRA on the performances of DC and AC. The results show that on the conventional scales (T=1, s=2), an HRA level above 50% results in a stronger association of DC with the ANS, compared with AC. On higher scales (T=4, s=6), there was no HRA and DC showed a similar performance to AC for all I/E ratios. The data suggest that the HRA level determines which of DC or AC is the optimal index for expressing ANS functions. Future clinical applications of DC and AC should be accompanied by an HRA analysis to provide a better index for assessing ANS.
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Affiliation(s)
- Qing Pan
- College of Information Engineering, Zhejiang University of Technology, 288 Liuhe Road, Hangzhou 310023, China
| | - Gongzhan Zhou
- College of Information Engineering, Zhejiang University of Technology, 288 Liuhe Road, Hangzhou 310023, China
| | - Ruofan Wang
- Department of Biomedical Engineering, Key Laboratory of Biomedical Engineering of Ministry of Education, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Yihua Yu
- Department of ICU, Zhejiang Hospital, 12 Lingyin Road, Hangzhou 310013, China
| | - Feng Li
- College of Information Engineering, Zhejiang University of Technology, 288 Liuhe Road, Hangzhou 310023, China
| | - Luping Fang
- College of Information Engineering, Zhejiang University of Technology, 288 Liuhe Road, Hangzhou 310023, China
| | - Jing Yan
- Department of ICU, Zhejiang Hospital, 12 Lingyin Road, Hangzhou 310013, China.
| | - Gangmin Ning
- Department of Biomedical Engineering, Key Laboratory of Biomedical Engineering of Ministry of Education, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
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Deceleration capacity: A novel predictor for total mortality in patients with non-ischemic dilated cardiomyopathy. Int J Cardiol 2016; 221:289-93. [PMID: 27404693 DOI: 10.1016/j.ijcard.2016.06.205] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 05/17/2016] [Accepted: 06/25/2016] [Indexed: 11/21/2022]
Abstract
OBJECTIVES We hypothesized that deceleration capacity (DC), a novel marker of cardiac autonomic modulation, is an independent predictor for mortality in patients with non-ischemic dilated cardiomyopathy (NICM). BACKGROUND NICM is associated with a high risk for sudden cardiac death (SCD). However there are no clinically established parameters available for risk stratification beyond LVEF. DC has been previously shown to be a strong independent predictor for total mortality in patients after myocardial infarction. METHODS Holter-ECG recordings of 201 patients NICM (83.1% male, mean age: 61.4years, mean LVEF: 33.3%) were analyzed by the method of phase-rectified-signal-averaging (PRSA) to obtain DC. RESULTS During a minimum follow-up of 40month 59 patients died. Kaplan Meyer Analysis showed a significantly higher mortality in patients with a DC below 4.5ms (log rank p=0.012) irrespective to the presence of atrial fibrillation. CONCLUSIONS Impaired DC is a powerful independent predictor for mortality in patients with NICM.
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Pan Q, Zhou G, Wang R, Cai G, Yan J, Fang L, Ning G. Do the deceleration/acceleration capacities of heart rate reflect cardiac sympathetic or vagal activity? A model study. Med Biol Eng Comput 2016; 54:1921-1933. [PMID: 27059998 DOI: 10.1007/s11517-016-1486-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 03/04/2016] [Indexed: 12/22/2022]
Abstract
Despite increased application of the deceleration capacity (DC) and acceleration capacity (AC) of heart rate indices as indicators of autonomic nervous system (ANS) function, it remains controversial as to whether they reflect cardiac sympathetic or vagal activity. We addressed this problem using a cardiovascular system model that allows analysis of DC and AC under controllable levels of sympathetic and vagal activities. Multi-scale DCs and ACs with various timescales T and wavelet scales s were computed from the simulated RR interval series under randomly fluctuating levels of ANS activity, and the correlations of the indices to ANS functions were assessed. Results showed that under the conventional scales (T = 1, s = 2), both DC and AC were solely dependent on vagal activity. With higher scales (T = 3, s = 5), both DC and AC were positively correlated to sympathetic activity and negatively correlated to vagal activity. These data suggest that DC and AC provide information on the same aspects of ANS activity and that their physiological significance is highly influenced by the timescales and wavelet scales used in the computation.
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Affiliation(s)
- Qing Pan
- College of Information Engineering, Zhejiang University of Technology, 288 Liuhe Road, Hangzhou, 310023, China
| | - Gongzhan Zhou
- College of Information Engineering, Zhejiang University of Technology, 288 Liuhe Road, Hangzhou, 310023, China
| | - Ruofan Wang
- Department of Biomedical Engineering, Key Laboratory of Biomedical Engineering of Ministry of Education, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China
| | - Guolong Cai
- Department of ICU, Zhejiang Hospital, 12 Lingyin Road, Hangzhou, 310013, China
| | - Jing Yan
- Department of ICU, Zhejiang Hospital, 12 Lingyin Road, Hangzhou, 310013, China
| | - Luping Fang
- College of Information Engineering, Zhejiang University of Technology, 288 Liuhe Road, Hangzhou, 310023, China
| | - Gangmin Ning
- Department of Biomedical Engineering, Key Laboratory of Biomedical Engineering of Ministry of Education, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China.
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