Cardiovascular Indices of Peripheral and Central Sympathetic Activation

Schächinger, Hartmut; Weinbacher, M; Kiss, Alexander; Ritz, R; Langewitz, Wolf

doi:10.1097/00006842-200109000-00012

Cited by 135 publications

(108 citation statements)

References 41 publications

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“…Since ECG can be easily and robustly measured in practice, this method of approximating PTT is widely used. In short-term cardiovascular control, change of PEP and PTT is both reflections of sympathetic nervous activity [5,31]. Therefore, PTT baseline can be used as a marker to represent the effects of slow breathing exercise on cardiovascular system, suggesting the suppression of the sympathetic nervous system activity and the reduction in BP.…”

Section: Ptt Baseline Change Versus Continuous Bp Monitoringmentioning

confidence: 99%

Effects of slow and regular breathing exercise on cardiopulmonary coupling and blood pressure

Zhang

Wang²,

Wu³

et al. 2016

Med Biol Eng Comput

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Meanwhile, BP was reduced significantly by the SPB procedure (SBP: from 122.0 ± 13.4 to 114.2 ± 14.9 mmHg, p < 0.001, DBP: from 82.2 ± 8.6 to 77.0 ± 9.8 mmHg, p < 0.001, PTT: from 172.8 ± 20.1 to 176.8 ± 19.2 ms, p < 0.001). Our results demonstrate that the SPB procedure can reduce BP and lengthen PTT significantly. Compared with amplitude dynamics, phase dynamics is a different marker for CPC analysis in reflecting cardiorespiratory coherence during slow breathing exercise. Our study provides a methodology to practice slow breathing exercise, including the setting of target breathing rate, change of CPC and the importance of regular breathing. The applications and usability of the study results have also been discussed.

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Section: Ptt Baseline Change Versus Continuous Bp Monitoringmentioning

confidence: 99%

Effects of slow and regular breathing exercise on cardiopulmonary coupling and blood pressure

Zhang

Wang²,

Wu³

et al. 2016

Med Biol Eng Comput

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“…The VU-AMS calculated interbeat intervals (IBIs) to assess the heart period between adjacent R-R signals. The pre-ejection period (PEP) served as a measure of peripheral sympathetic drive and myocardial contractility (Berntson, Lozano, Chen, & Cacioppo, 2004; Cacioppo et al, 1994; Newlin & Levenson, 1979; Schächinger, Weinbacher, Kiss, Ritz, & Langewitz, 2001). PEP was calculated by the VU-AMS adding a fixed Q-R interval of 48 ms to the time from R to the B-point (De Geus & van Doornen, 1996).…”

Section: Methodsmentioning

confidence: 99%

“…PEP was calculated by the VU-AMS adding a fixed Q-R interval of 48 ms to the time from R to the B-point (De Geus & van Doornen, 1996). A shorter PEP means an increase in sympathetic drive (Schächinger et al, 2001). Parasympathetic drive was measured using RMSSD as an index of heart rate variability (Malik et al, 1996).…”

Section: Methodsmentioning

confidence: 99%

The enemy in the mirror: self-perception-induced stress results in dissociation of psychological and physiological responses in patients with dissociative disorder

Schäflein

Sattel

Schmidt

et al. 2018

European Journal of Psychotraumatology

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Background: Patients suffering from dissociative disorders (DD) are characterized by an avoidance of aversive stimuli. Clinical experience has shown that DD patients typically avoid the confrontation with their own faces in a mirror (CFM). Objective: To investigate potential CFM-associated self-reported and psychophysiological stress reactions of DD patients, which most likely inform on the still unknown pathophysiology of dysfunctional self-perception in DD. Method: Eighteen DD patients and 18 healthy controls (HCs) underwent CFM. They were assessed for CFM-induced subjective self-reported stress, acute dissociative symptoms and sympathetic and parasympathetic drive using impedance cardiography. Results: DD patients experienced more subjective stress and acute dissociation than HCs upon CFM. Their psychological stress response did not activate the sympathetic and parasympathetic nervous system. Conclusions: In DD patients, CFM constitutes serious self-reported stress and is associated with a blunted autonomic reactivity. Therapeutic approaches promoting self-perception and self-compassion, in particular by using CFM, might serve as goal-oriented diagnostic and therapeutic tools in DD.

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“…Several earlier studies in the field of bio-impedance investigated a parameter equivalent to the Pre-Ejection Period (PEP) and obtained from the ICG (ICG-PEP) [3,4,5]. The PEP is considered to be a measure for the time delay between the electrical and mechanical activation of the heart.…”

Section: Initial Systolic Time Intervalmentioning

confidence: 99%

Assessing cardiac preload by the Initial Systolic Time Interval obtained from impedance cardiography

Meijer

Smorenberg

Lust

et al. 2010

Journal of Electrical Bioimpedance

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The Initial Systolic Time Interval (ISTI), obtained from the electrocardiogram (ECG) and impedance cardiogram (ICG), is considered to be a measure for the time delay between the electrical and mechanical activity of the heart and reflects an early active period of the cardiac cycle. The clinical relevance of this time interval is subject of study. This paper introduces a method using ISTI to evaluate and predict the circulatory response to fluid administration in patients after coronary artery bypass graft surgery and presents preliminary results of a pilot study by comparing ISTI with cardiac output (CO) responsiveness. Also the use of the pulse transit time (PTT), earlier recommended for this purpose, was investigated. The results showed an inverse relationship between ISTI and CO at all moments of fluid administration and also an inverse relationship between the changes ΔISTI and ΔCO before and after full fluid administration. No relationships between PTT and CO or ΔPTT and ΔCO were found. It is concluded that ISTI is dependent upon preload, and that ISTI has the potential to be used as a clinical parameter assessing preload.

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Cardiovascular Indices of Peripheral and Central Sympathetic Activation

Abstract: Our data provide empirical evidence of separable peripheral and central sympathetic response components. The combined report of low-frequency BPV and PEP gives distinct information on both central SNS control and the level of sympathetic cardiac activation achieved.

Cited by 135 publications

References 41 publications

Effects of slow and regular breathing exercise on cardiopulmonary coupling and blood pressure

Effects of slow and regular breathing exercise on cardiopulmonary coupling and blood pressure

The enemy in the mirror: self-perception-induced stress results in dissociation of psychological and physiological responses in patients with dissociative disorder

Assessing cardiac preload by the Initial Systolic Time Interval obtained from impedance cardiography

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