Nonlinear heart rate variability in CABG patients and the preconditioning effect

Wu, Zhongkai; Vikman, Saila; Laurikka, Jari; Pehkonen, Erkki; Iivainen, Tiina; Huikuri, Heikki V.; Tarkka, Matti

doi:10.1016/j.ejcts.2005.03.011

Cited by 41 publications

(37 citation statements)

References 24 publications

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“…However, they were in opposition to the results reported by Tseng et al [15], where the HRV parameters recorded before PCI procedure did not differ significantly from those assessed directly after the PCI procedure. Moreover, many studies have demonstrated that coronary artery bypass grafting (CABG) also leads to significant HRV reduction, which is even more pronounced than after myocardial infarction [10][11][12][13]. In addition, HRV reduction after cardiac surgery is not exclusively related to PCI or CABG, as it is also recorded in patients undergoing valve surgery [14].…”

Section: Discussionmentioning

confidence: 94%

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Effect of a Percutaneous Coronary Intervention Procedure on Heart Rate Variability and Pulse Transit Time Variability: A Comparison Study Based on Fuzzy Measure Entropy

Zhang

Liu

et al. 2016

Entropy

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Percutaneous coronary intervention (PCI) is a common treatment method for patients with coronary artery disease (CAD), but its effect on synchronously measured heart rate variability (HRV) and pulse transit time variability (PTTV) have not been well established. This study aimed to verify whether PCI for CAD patients affects both HRV and PTTV parameters. Sixteen CAD patients were enrolled. Two five-minute ECG and finger photoplethysmography (PPG) signals were recorded, one within 24 h before PCI and another within 24 h after PCI. The changes of RR and pulse transit time (PTT) intervals due to the PCI procedure were first compared. Then, HRV and PTTV were evaluated by a standard short-term time-domain variability index of standard deviation of time series (SDTS) and our previously developed entropy-based index of fuzzy measure entropy (FuzzyMEn). To test the effect of different time series length on HRV and PTTV results, we segmented the RR and PTT time series using four time windows of 200, 100, 50 and 25 beats respectively. The PCI-induced changes in HRV and PTTV, as well as in RR and PTT intervals, are different. PCI procedure significantly decreased RR intervals (before PCI 973˘85 vs. after PCI 907˘100 ms, p < 0.05) while significantly increasing PTT intervals (207˘18 vs. 214˘19 ms, p < 0.01). For HRV, SDTS-only output significant lower values after PCI when time windows are 100 and 25 beats while presenting no significant decreases for other two time windows. By contrast, FuzzyMEn gave significant lower values after PCI for all four time windows (all p < 0.05). For PTTV, SDTS hardly changed after PCI at any time window (all p > 0.90) whereas FuzzyMEn still reported significant lower values (p < 0.05 for 25 beats time window and p < 0.01 for other three time windows). For both HRV and PTTV, with the increase of time window values, SDTS decreased while FuzzyMEn increased. This pilot study demonstrated that the RR interval decreased whereas the PTT interval increased after the PCI procedure and that there were significant reductions in both HRV and PTTV immediately after PCI using the FuzzyMEn method, indicating the changes in underlying mechanisms in cardiovascular system.

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Section: Discussionmentioning

confidence: 94%

“…Studies have invariably demonstrated that coronary artery bypass grafting (CABG) also leads to significant HRV reduction [10][11][12][13]. In addition, HRV reduction after cardiac surgery is not exclusively related to PCI or CABG, as it is also recorded in patients undergoing valve surgery [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of a Percutaneous Coronary Intervention Procedure on Heart Rate Variability and Pulse Transit Time Variability: A Comparison Study Based on Fuzzy Measure Entropy

Zhang

Liu

et al. 2016

Entropy

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“…It is possible that the release of local triggers of IPC activates the autonomic nervous system either directly (Schoemaker & Van Heijningen, 2000;Liem et al, 2002) or via sensory nerves (Tang et al, 1999;Xiao et al, 2001;Hu et al, 2002), and transfers the signal to the myocardium or other remote tissues. Evidence exists that sympathovagal regulation might be related to the protective mechanism of IPC (Loukogeorgakis et al, 2005;Wu et al, 2005). IPC is mediated by sympathetic neurotransmitter release and 1 -adrenergic receptor stimulation (Banerjee et al, 1993;Cohen et al, 2001).…”

Section: Heart Rate -A Measure Of Autonomic Nervous System Activitymentioning

confidence: 99%

Chronobiological Aspects of the Heart Rhythm Disorders at the Change of Pulmonary Ventilation in Rat Model

Švorc¹,

Marossy²,

Grešová³

et al. 2012

Cardiac Arrhythmias - New Considerations

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“…Especially with the increased use of nonlinear dynamics in clinical studies Guzzetti et al 1996Guzzetti et al , 2000Voss et al 1998;Yeragani et al 2004;Kim et al 2005;Wu et al 2005;Bar et al 2007), it is important to understand the mechanisms underlying the generation of these fluctuations. However, it is becoming clear that altered nonlinear behaviour can be found in several pathologies (Wu et al 2005;Porta et al 2007a,b), although the exact contributions or importance of the nonlinear indices in these cases also need to be further investigated.…”

Section: Non-linear Controlmentioning

confidence: 99%

Complexity of cardiovascular regulation in small animals

Aubert

Vandeput

Beckers

et al. 2009

Phil. Trans. R. Soc. A.

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Oscillations of heart rate and blood pressure are related to the activity of the underlying control mechanism. They have been investigated mostly with linear methods in the time and frequency domains. Also, in recent years, many different nonlinear analysis methods have been applied for the evaluation of cardiovascular variability. This review presents the most commonly used nonlinear methods. Physiological understanding is obtained from various results from small animals.

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Nonlinear heart rate variability in CABG patients and the preconditioning effect

Cited by 41 publications

References 24 publications

Effect of a Percutaneous Coronary Intervention Procedure on Heart Rate Variability and Pulse Transit Time Variability: A Comparison Study Based on Fuzzy Measure Entropy

Effect of a Percutaneous Coronary Intervention Procedure on Heart Rate Variability and Pulse Transit Time Variability: A Comparison Study Based on Fuzzy Measure Entropy

Chronobiological Aspects of the Heart Rhythm Disorders at the Change of Pulmonary Ventilation in Rat Model

Complexity of cardiovascular regulation in small animals

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