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首页> 外文期刊>Translational Stroke Research >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

机译：接受有氧运动急性发作的中风患者的心率变异性

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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.
机译：中风与中枢神经系统损伤引起的心脏自主神经功能障碍有关。心率变异性（HRV）的功能障碍可能反映了自主神经系统的功能障碍。由于有氧功能的改善和其他有益作用（如增加运动单位的募集，有利于肌肉纤维的发育），有氧训练已用于患者的康复过程中。这项研究的目的是评估有氧运动急性发作之前，之中和之后的卒中患者的心脏自主神经调节。使用心率（HR）监视器记录38名中风患者的心率，并使用该数据通过HRV分析评估心脏自主神经调节。在开始实验之前，患者处于仰卧位并保持静止状态（R）10分钟。之后，他们在跑步机上进行步行锻炼（E），直到达到最大心率的50-70％。有氧运动30分钟后，建议受试者再保持仰卧姿势30分钟，以记录恢复（RC）期间的HR。记录分为三个阶段：运动结束后立即进行RC1，恢复12至17分钟之间的RC2，以及恢复最后5分钟时的RC3。运动期间，MeanRR指数（577.3±92 vs.861.1 + 109），RRtri（5.1±2 vs. 9.1±3），高频分量（11.2±4 vs. 167±135ms）和SD1显着下降与静止值相比（5.7±2 vs. 16.9±7 ms）与静息值（42.4±19）相比，SD在E（27.6±19），RC1（29.9±11），RC2（27.9±9）和RC3（32.4±13）期间下降。与R水平（394.6±±315）相比，低频分量在E（545±±82）时增加，但在RC1（166.3±±129），RC2（206.9±±152）和RC3（249.5±±236）期间降低。这些发现表明，中风患者在运动期间和运动后至少30分钟内HRV降低，这是由于代表交感神经系统的指数增加所反映的自主神经失调。

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