Cardiac Autonomic Regulation under Hypnosis Assessed by Heart Rate Variability: Spectral Analysis and Fractal Complexity

2009 ◽  
Vol 60 (2) ◽  
pp. 104-112 ◽  
Author(s):  
André E. Aubert ◽  
Bart Verheyden ◽  
Frank Beckers ◽  
Jan Tack ◽  
Joris Vandenberghe
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Analysis ◽  
Autonomic Regulation ◽  
Cardiac Autonomic Regulation

scholarly journals HRV as predicting the outcome of acute stroke

2008 ◽  
Vol 7 (5-2) ◽  
pp. 444-447
Author(s):  
I. M. Utochkina ◽  
Yu. S. Shamurov ◽  
V. A. Mironov
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Analysis ◽  
Ischemic Stroke ◽  
Acute Stroke ◽  
Hemorrhagic Stroke ◽  
Fatal Outcome ◽  
Autonomic Regulation

To study the peculiarities of parameters autonomic regulation at various types of stroke in the acutest and after the acute stroke periods, and also the degrees of their influence on the forecast at stroke are appreciated results of the spectral analysis of heart rate variability in patients with hemorrhagic stroke and ischemic stroke. The indexes of heart rate variability for patients with a fatal outcome are exposed.

Effect of fingolimod on cardiac autonomic regulation in patients with multiple sclerosis

2015 ◽  
Vol 22 (8) ◽  
pp. 1080-1085 ◽  
Author(s):  
Sakari Simula ◽  
Tomi Laitinen ◽  
Tiina M Laitinen ◽  
Tuula Tarkiainen ◽  
Päivi Hartikainen ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Frequency Ratio ◽  
Low Frequency ◽  
Autonomic Regulation ◽  
Rr Interval ◽  
Cardiac Autonomic Regulation ◽  
Multiple Sclerosis Patients

Background: Fingolimod modulates sphingosine-1-phosphate receptors that are also found in cardiovascular tissue. Objective: To investigate the effects of fingolimod on cardiac autonomic regulation prospectively. Methods: Twenty-seven relapsing–remitting multiple sclerosis patients underwent 24-hour electrocardiogram recording before, at the first day of fingolimod treatment (1d) and after three months of continuous dosing (3mo). The time interval between two consecutive R-peaks (RR-interval) was measured. Cardiac autonomic regulation was assessed by the various parameters of heart rate variability. Parasympathetic stimulation prolongs the RR-interval and increases heart rate variability while the effects of sympathetic stimulation are mainly the opposite. The low frequency/high frequency ratio reflects sympathovagal balance. Results: From baseline to 1d, a prolongation of the RR-interval ( P<0.001), an increase in the values of various heart rate variability parameters ( P<0.05 to P<0.001) and a decrease in the low frequency/high frequency ratio ( P<0.05) were demonstrated. At 3mo, although the RR-interval remained longer ( P<0.01), the values of various heart rate variability parameters were lower ( P<0.01 to P<0.001) as compared to baseline. At 3mo, the low frequency/high frequency ratio ( P<0.05) was higher in men than in women although no such difference was found at baseline or at 1d. Conclusions: After an initial increase in parasympathetic regulation, continuous fingolimod dosing shifts cardiac autonomic regulation towards sympathetic predominance, especially in men. Careful follow-up of fingolimod-treated relapsing–remitting multiple sclerosis patients is warranted as sympathetic predominance associates generally with impaired outcome. ClinicalTrials.cov: NCT01704183

scholarly journals Binary symbolic dynamics analysis to detect stress-associated changes of nonstationary heart rate variability

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Conrad Spellenberg ◽  
Peter Heusser ◽  
Arndt Büssing ◽  
Andreas Savelsbergh ◽  
Dirk Cysarz
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Psychological Stress ◽  
Symbolic Dynamics ◽  
Acute Stress ◽  
Stress Test ◽  
Autonomic Regulation ◽  
Rr Interval ◽  
Cardiac Autonomic Regulation ◽  
Acute Psychological Stress

Abstract Psychological stress may have harmful physiological effects and result in deteriorating health. Acute psychological stress acts also on cardiac autonomic regulation and may lead to nonstationarities in the interbeat interval series. We address the requirement of stationary RR interval series to calculate frequency domain parameters of heart rate variability (HRV) and use binary symbolic dynamics derived from RR interval differences to overcome this obstacle. 24 healthy subjects (12 female, 20–35 years) completed the following procedure: waiting period, Trier Social Stress Test to induce acute psychological stress, recovery period. An electrocardiogram was recorded throughout the procedure and HRV parameters were calculated for nine 5-min periods. Nonstationarities in RR interval series were present in all periods. During acute stress the average RR interval and SDNN decreased compared to rest before and after the stress test. Neither low frequency oscillations (LF), high frequency oscillations (HF) nor LF/HF could unambiguously reflect changes during acute stress in comparison to rest. Pattern categories derived from binary symbolic dynamics clearly identified acute stress and accompanying alterations of cardiac autonomic regulation. Methods based on RR interval differences like binary symbolic dynamics should be preferred to overcome issues related to nonstationarities.

Autonomic regulation after exercise evidenced by spectral analysis of heart rate variability in asthmatic children

2000 ◽  
Vol 85 (3) ◽  
pp. 233-237 ◽  
Author(s):  
Hidehiko Fujii ◽  
Osamu Fukutomi ◽  
Ryosuke Inoue ◽  
Shinji Shinoda ◽  
Hiroyuki Okammoto ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Analysis ◽  
Autonomic Regulation ◽  
Asthmatic Children

Heart rate variability in adolescent major depression

2011 ◽  
Vol 26 (S2) ◽  
pp. 361-361 ◽  
Author(s):  
I. Tonhajzerova ◽  
I. Ondrejka ◽  
Z. Turianikova ◽  
L. Chladekova ◽  
K. Javorka ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Depressive Symptoms ◽  
Major Depression ◽  
Rating Scale ◽  
Autonomic Regulation ◽  
Cardiac Complications ◽  
Nonlinear Methods ◽  
Cardiac Autonomic Regulation ◽  
Linear And Nonlinear

IntroductionImpaired cardiac autonomic regulation is likely important contributor to a potential cardiac complications in major depression. The knowledge regarding the depression effect on cardiac regulation in adolescent age is limited. Aim was to study short-term heart rate variability (HRV) as an index of cardiac autonomic control in never-treated major depressive disorder (MDD) adolescent patients using linear and nonlinear methods related to depressive symptoms severity.MethodsWe have examined 20 MDD girls and 20 healthy age-matched girls at the age from 15 to 18 years. The ECG was recorded in three positions: supine - orthostasis - supine. The HRV was analyzed using linear (time and frequency analysis) and novel nonlinear (symbolic dynamics, time assymetry) methods. The severity of depressive symptoms was evaluated using the scales Montgomery-Asberg Depression Rating Scale (MADRS) and Children’s Depression Inventory (CDI).ResultsSeveral HRV linear and nonlinear parameters were significantly reduced in MDD group compared to controls in supine rest and during orthostasis. The HRV nonlinear analysis indices significantly correlated with depressive symptoms severity.ConclusionsLinear and nonlinear analyses revealed reduced magnitude and complexity of the HRV indicating impaired neurocardiac regulation in adolescent major depression. In addition, new approach of HRV analysis using nonlinear methods provided important information about depressive symptoms severity and cardiac autonomic regulation relations.

scholarly journals A call to reevaluate cardiac autonomic assessment after spinal cord injury

2018 ◽  
Vol 315 (5) ◽  
pp. H1088-H1090
Author(s):  
Hisham Sharif ◽  
Michael F. La Fountaine ◽  
Jill M. Wecht ◽  
David S. Ditor
Keyword(s):  
Spinal Cord ◽  
Heart Rate ◽  
Spinal Cord Injury ◽  
Heart Rate Variability ◽  
Autonomic Regulation ◽  
Cardiac Autonomic Regulation ◽  
Cord Injury ◽  
Cold Face ◽  
Head Up Tilt ◽  
Cold Face Test

This “Perspectives” article puts forward the notion that measuring heart rate variability, or other forms of cardiac autonomic regulation, after spinal cord injury must be performed during a test of autonomic stress. Resting values of heart rate variability are often similar to those obtained from able-bodied individuals, which may therefore be falsely interpreted as normal or healthy autonomic regulation. However, evidence shows that despite normal resting values, cardiac autonomic control is impaired when individual with spinal cord injury are subjected to a cold face test, head-up tilt, or recovery from exercise. Accordingly, examination of cardiac autonomic function must be performed during an autonomic challenge, as resting measures do not accurately reflect the state of cardiovascular regulation after spinal cord injury and can provide false information.

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