Effect of Exercise-based Cardiac Rehabilitation on Patients with Acute Coronary Syndrome after Percutaneous Coronary Intervention / 中国康复理论与实践

ABSTRACT

Objective:To analyze the effects of exercise-based cardiac rehabilitation (ER) on patients with acute coronary syndrome (ACS) after percutaneous coronary intervention (PCI), and to identify which type of ACS patients would benefit most in terms of cardiovascular functional capacity after ER. Methods:From December, 2017 to July, 2019, 31 ACS patients who discharged in a stable situation after PCI were studied. All patients were referred to a three-month ER program after discharge. They were divided into normal wall motion group (normal group, n = 14) and abnormal regional wall motion group (abnormal group, n = 17) according to baseline myocardial wall motion reported by echocardiography. The degree of wall motion abnormalities was quantified by the wall motion score index (WMSI). Echocardiography and cardiopulmonary exercise testing (CPET) were performed before and after ER. Results:Eight patients were dropped, and 23 patients completed the trial. WMSI decreased in the abnormal group (Z = -2.852, P = 0.004), and the left ventricular ejection fraction (LVEF) didn't change in both groups (P > 0.05) after ER. CPET showed that the heart rate at rest decreased in the normal group after ER (t = -2.268, P = 0.047); and the peak work rate, peak oxygen uptake, percentage of predicted value of peak oxygen uptake, peak minute ventilation and the third minute heart rate recovery increased in the abnormal group after ER (t > 2.739, P < 0.05). Conclusion:ER during recovery period could help more improve the cardiac function and exercise tolerance of ACS patients with abnormal WMSI after PCI. WMSI is an important indicator of cardiac function in ACS patients with preserved ejection fraction.