BACKGROUND: The aim of the present study was to evaluate the effect of a cardiac rehabilitation program using a mobile application on activity tolerance, fatigue, and dyspnea in patients with acute myocardial infarction in hospitals affiliated to Shahrekord University of Medical Sciences, Iran, in 2018. METHOD(S): In a randomized clinical trial study, 100 patients with acute myocardial infarction were selected in two groups of control (50) and test (50). In test group, the application of cardiac rehabilitation with weekly monitoring, medication reminders, tests, exercise, warning in case of shortness of breath and fatigue and chest pain, increase or decrease in blood pressure and heart rate, family education, risk factors, and reducing smoking was implemented for 8 weeks. For the control group, routine hospital trainings were performed. At the end of the rehabilitation program, data related to patients' physical activity scores, fatigue, and shortness of breath were analyzed at the beginning and end of the intervention, as well as between the two groups. FINDING(S): After the intervention, physical activity in the experimental group with a mean of 3.92 +/- 1.23 was significantly higher than the control group with the mean of 2.90 +/- 1.28 (p < 0.001). Moreover, fatigue and dyspnea in the experimental group with a mean of 3.57 +/- 1.15 and 3.48 +/- 2.73, respectively, were significantly less than the control group with the mean of 4.02 +/- 1.17 and 4.66 +/- 3.48, respectively (p < 0.050). CONCLUSION(S): The implementation of cardiac rehabilitation program via mobile application relieved fatigue and dyspnea, and improved activity tolerance in patients with myocardial infarction.

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