Improvement of Cardiac Function in Patients With Ischemic Cardiomyopathy by Extracorporeal Shock Wave Therapy: a Multicenter Clinical Study

Inclusion Criteria: * Patients were 18 to 80 years old; * Coronary angiography (CA) or multi-slice CT coronary angiography (CTCA) suggestive of moderate to severe coronary artery stenosis; * Chest tightness, onset of shortness of breath, and poor exercise tolerance after receiving formal drug treatment (with or without stent or bypass graft); * Hospitalized more than 2 times within 1 year due to the aforementioned problems; * CCS angina grading higher than grade II, and New York Heart Association (NYHA) class I-III; * More than 1 month after acute myocardial infarction (AMI) and 1 month after percutaneous coronary intervention (PCI) surgery. Exclusion Criteria: * AMI、PCI or coronary artery bypass graft (CABG) within the 4 weeks prior to the study; * History of heart transplantation; * History of metal valve replacement surgery; * Intra-cardiac thrombus; * Left Ventricular Ejection Fraction (LVEF) \< 30 % and unstable hemodynamics; * Arrhythmia with a rate \< 40 bpm or \> 120 bpm; * Skin ulceration or infection in the treatment area; * Severe obstructive lung disease.