impact of exercise on the activity of the autonomic nervous system among patients with acute myocardial infarction

impact of exercise on the activity of the autonomic nervous system among patients with acute myocardial infarction

abstract: considering the diversity of proposed programs, various studies yielded different findings in this regard. the aim of the present study was to evaluate different types of exercise as a method of rehabilitation after acute myocardial infarction on the activity of the autonomic nervous system.

methods: in this case-control and prospective study, a total of 60 patients with the first acute myocardial infarction were randomly select- ed. controlled treadmill exercise was performed for 15-20 min- utes three days a week for three consecutive weeks and then5 weeks of home-based exercise, including 30-min walking 3 times a week based on heart rate in the two groups (n= 20 people per group). the control group performed home-based exercise for 8 weeks.

results: in a, b, and control groups, the mean changes in sdnn (28.30, 29.28, and 15.40, respectively), lf (57.10, 198.8 and -47.70, respectively), hf (-11.70, 120.60, and -58.10, respectively) (192.80, 1251.20, and-0.225, respectively), pnn50 (0.80, 4.60, tp and -0.40, respectively), sdnn index (90.20, 13.4, and -0.20, respectively), and sdann (80.80, 22.24, and 16.20, respectively) were significantly higher in the intervention groups, but there was no statistically significant difference between the two inter- vention groups (a and b).

conclusion: the present study showed that in-hospital exercise-based reha- bilitation can have a more favorable effect on the activity of the autonomic nervous system after acute myocardial infarction. it seems necessary to establish rehabilitation centers in hospitals, because uncontrolled home-based rehabilitation is probably less effective for various reasons, such as lack of strict adher - ence to the instructions.