| 제목 |
Initial Ejection Fraction and Home-based Cardiac Rehabilitation in Acute Myocardial Infarction |
| 소속 |
Dong-A University College of Medicine, Department of Physical medicine and Rehabilitation Medicine1 |
| 저자 |
Jong Hwa Lee1†, Sang Beom Kim1, Kyeong Woo Lee1, Jin Gee Park1, Young Hwan Kim1* |
Objective: To evaluate the effects of home-based cardiac rehabilitation (CR) on functional capacity according to ejection fraction (EF) after acute myocardial infarction (AMI).
Method: We retrospectively reviewed the medical records of the AMI patients who had done home-based CR from 2015 to 2017. 62 patients were recruited. All patients underwent an exercise tolerance test (ETT) at about 2 weeks, 3 months and 6 months after AMI. The patients were divided into two groups according to EF. EF 50% and over were allocated to normal EF group and EF under 50% were to low EF group. According to the result of initial ETT and functional ability, patients started home-based CR. Detailed exercise regimen was prescribed and how to manage and modify the risk factor was also educated. Cardiopulmonary capacities were analyzed after every ETT which was done about 3-month interval. Evaluated cardiopulmonary capacities were heart rate and blood pressure (BP) at rest and maximum, peak oxygen consumption, anaerobic threshold, metabolic equivalent (MET) and exercise time.
Results: 38 patients were allocated to normal EF group and 24 patients were allocated to low EF group. There were no significant differences in the baseline characteristics between two groups except for AMI type (Table 1). After home-based CR, both groups showed improvement in most of the measurements when compared to initial ETT except for maximal systolic BP of 3 and 6 month in normal EF group and maximal diastolic BP of 6 month in low EF group (Table 2). But the changes in all measurements after 3 and 6 month between groups have no significant differences (Table 3).
Conclusion: There was no relationship between the effects of home-based CR and the initial ejection fraction after AMI. And any adverse events related to home-based CR did not occur during this study. In the patients with low initial EF after AMI, home-based CR could be as effective as in the patients with normal EF. Because most patients’ EFs in low EF group were between 35 and 45, it is limitation that this result cannot apply to the severely low EF.
|
|
Table 1. Baseline characteristics
Table 2. Comparison of exercise capacity
Table 3. Comparison of % changes in exercise capacity after 3 and 6 months in both groups
|
