NDLI: Heart Rate Variability in Stroke Patients Submitted to an Acute Bout of Aerobic Exercise

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Heart Rate Variability in Stroke Patients Submitted to an Acute Bout of Aerobic Exercise

Content Provider	Springer Nature Link
Author	Raimundo, Rodrigo Daminello Abreu, Luiz Carlos Adami, Fernando Vanderlei, Franciele Marques Carvalho, Tatiana Dias Moreno, Isadora Lessa Pereira, Valdelias Xavier Valenti, Vitor Engracia Sato, Monica Akemi
Copyright Year	2013
Abstract	Stroke has been associated with cardiac autonomic impairment due to damage in central nervous system. Dysfunction in heart rate variability (HRV) may reflect dysfunction of the autonomic nervous system. Aerobic training has been used in the rehabilitation procedure of patients, due to improvement of aerobic function and other beneficial effects as increased recruitment of motor units, favoring the development of muscle fibers. The purpose of this study was to evaluate the cardiac autonomic modulation in patients with stroke before, during, and after an acute bout of aerobic exercise. The heart rate of 38 stroke patients was recorded using a heart rate (HR) monitor and the data were used to assess cardiac autonomic modulation through HRV analysis. The patients were in supine position and remained at resting condition (R) for 10 min before starting the experiment. Afterwards, they were submitted to walking exercise (E) on a treadmill until achieve 50–70 % of maximum heart rate. After 30 min of aerobic exercise, the subjects were advised to remain in supine position for additional 30 min in order to record the HR during the recovery (RC) period. The recordings were divided in three periods: RC1, immediately after the end of exercise bout, RC2, between 12 and 17 min of recovery, and RC3, at the final 5 min of recovery. A significant decrease was observed during exercise in the MeanRR index (577.3 ± 92 vs. 861.1 + 109), RRtri (5.1 ± 2 vs. 9.1 ± 3), high frequency component (11.2 ± 4 vs. 167 ± 135 ms) and SD1 (5.7 ± 2 vs. 16.9 ± 7 ms) compared to resting values. The SDNN index reduced during E (27.6 ± 19) and RC1 (29.9 ± 11), RC2 (27.9 ± 9) and RC3 (32.4 ± 13) compared to resting values (42.4 ± 19). The low frequency component increased during E (545 ± 82), but decreased during RC1 (166.3 ± 129), RC2 (206.9 ± 152), and RC3 (249.5 ± 236) compared to R levels (394.6 ± 315). These findings suggest that stroke patients showed a reduced HRV during and at least 30 min after exercise, due to an autonomic imbalance reflected by increased indexes that represent the sympathetic nervous system.
Starting Page	488
Ending Page	499
Page Count	12
File Format	PDF
ISSN	18684483
Journal	Translational Stroke Research
Volume Number	4
Issue Number	5
e-ISSN	1868601X
Language	English
Publisher	Springer US
Publisher Date	2013-05-22
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cardiac autonomic modulation Heart rate Neurological disorders Cardiovascular responses Ischemia Vagus nerve Autonomic nervous system The sympathetic nervous system The parasympathetic nervous system Neurosciences Neurology Cardiology Neurosurgery Vascular Surgery
Content Type	Text
Resource Type	Article
Subject	Cardiology and Cardiovascular Medicine Neuroscience Neurology (clinical)

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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