【論文摘要】Resting Heart Rate Improvement in Patients Following Acute Myocardial Infarction by Exercise Training

【論文摘要】運動訓練針對急性心肌梗塞患者靜止心率的影響

汪泓耀(Hung-Yao Wang) ； 鍾蕙竹(Hui-Chu Chung) ； 蔣尚霖(Shang-Lin Chiang) ； 黎桂珍(Kuei-Chen Lee)

《物理治療》 44卷2期 (2019/06) Pp. 109-109

https://doi.org/10.6215/FJPT.201906.P05

摘要

Background and Purpose: Resting heart rate (RHR) is a marker of vagal tone that is a powerful predictor of mortality in patients with coronary artery disease. However, there are limited data discussing the training effect on the RHR in patients with acute myocardial infarction (AMI). The purpose of this study was to evaluate the effect of cardiac rehabilitation (CR) program on RHR recovery and maximum oxygen consumption (VO_2max) in patients with recent AMI. Methods: Forty patients (38 males; 2 females) who were 6 weeks after an AMI attack were enrolled in the study. Each patient underwent the symptom-limited exercise tests before and after the CR intervention. The cardiorespiratory variables including heart rate (HR), VO_2max, HR recovery, resting blood pressure, and maximum HR were measured during the exercise testing. All patients completed 30 min aerobic training under physical therapist's supervision twice a week and home-based exercise once a week for 12 weeks. A paired t-test was applied to compare the differences of all outcome indicators between preand post-intervention. Results: After training, mean RHR significantly decreased by 5% (79.9 to 75.23 beat/ min). Comparable changes were found in duration, VO_2max and double-product at submaximal and maximal workloads. Conclusion: The effect of CR on AMI patient can decrease RHR significantly, and also improve their exercise performance. Clinical Relevance: The findings provide important information to designing proper CR program for AMI patients. Doing aerobic exercise can not only decrease RHR but also improve other exercise parameters.