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A growing body of evidence suggests that walking reduces the incidence of coronary events, so the present study investigated whether walking influences left ventricular function in 30 patients with acute myocardial infarction (AMI) who had undergone successful percutaneous coronary intervention (PCI). The patients were randomly assigned to either a 3-month exercise training program of walking (group W, n=15) or a control group (group C, n=15). At both the beginning and end of the study, patients underwent exercise stress echocardiography to determine left ventricular ejection fraction (LVEF) at rest and during exercise. At baseline, there was no difference in LVEF at rest or during exercise between the two groups. After 3 months, LVEF during exercise was significantly improved compared with at rest in group W (61+/-3% during exercise vs 57+/-5% at rest, p&lt;0.01), whereas no difference was observed between the LVEF at rest and that during exercise in group C (54+/-5% at rest vs 52+/-7% during exercise, NS). Walking may be beneficial for improving left ventricular function during exercise in patients with AMI.

circulation journal

Improvement of Left Ventricular Dysfunction During Exercise by Walking in Patients With Successful Percutaneous Coronary Intervention for Acute Myocardial Infarction.