naa a22 4500 51077623X CHVBK 20180411083231.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s12975-013-0263-4 doi (NATIONALLICENCE)springer-10.1007/s12975-013-0263-4 Heart Rate Variability in Stroke Patients Submitted to an Acute Bout of Aerobic Exercise [Elektronische Daten] [Rodrigo Raimundo, Luiz de Abreu, Fernando Adami, Franciele Vanderlei, Tatiana de Carvalho, Isadora Moreno, Valdelias Pereira, Vitor Valenti, Monica Sato] 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 10min before starting the experiment. Afterwards, they were submitted to walking exercise (E) on a treadmill until achieve 50-70% of maximum heart rate. After 30min of aerobic exercise, the subjects were advised to remain in supine position for additional 30min 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 17min of recovery, and RC3, at the final 5min 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 ± 135ms) and SD1 (5.7 ± 2 vs. 16.9 ± 7ms) 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 30min after exercise, due to an autonomic imbalance reflected by increased indexes that represent the sympathetic nervous system. Springer Science+Business Media New York, 2013 Cardiac autonomic modulation nationallicence Heart rate nationallicence Neurological disorders nationallicence Cardiovascular responses nationallicence Ischemia nationallicence Vagus nerve nationallicence Autonomic nervous system nationallicence The sympathetic nervous system nationallicence The parasympathetic nervous system nationallicence Raimundo Rodrigo Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut de Abreu Luiz Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut Adami Fernando Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut Vanderlei Franciele Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut de Carvalho Tatiana Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut Moreno Isadora Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut Pereira Valdelias Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut Valenti Vitor Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut Sato Monica Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut Translational Stroke Research Springer US; http://www.springer-ny.com 4/5(2013-10-01), 488-499 1868-4483 4:5<488 2013 4 12975 https://doi.org/10.1007/s12975-013-0263-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12975-013-0263-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Raimundo Rodrigo Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut NATIONALLICENCE 700 1- de Abreu Luiz Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut NATIONALLICENCE 700 1- Adami Fernando Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut NATIONALLICENCE 700 1- Vanderlei Franciele Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut NATIONALLICENCE 700 1- de Carvalho Tatiana Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut NATIONALLICENCE 700 1- Moreno Isadora Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut NATIONALLICENCE 700 1- Pereira Valdelias Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut NATIONALLICENCE 700 1- Valenti Vitor Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut NATIONALLICENCE 700 1- Sato Monica Faculdade Medicina ABC, São Paulo, Santo André, Brazil aut NATIONALLICENCE 773 0- Translational Stroke Research Springer US; http://www.springer-ny.com 4/5(2013-10-01), 488-499 1868-4483 4:5<488 2013 4 12975 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer