Follow-up Follow-up data of all the patients were obtained by outpatient visit and/or phone contact and/or data collection from clinical database of the Institution. Minimum follow-up will be 6 months. Hospital/patients' records were screened for the occurrence of clinical events to confirm the obtained information. The clinical end-points are: 1) cardiac death, 2) non-fatal acute myocardial infarction, 3) unstable angina requiring hospitalization, 4) percutaneous or surgical revascularization. Cardiac death is defined as death caused by acute myocardial infarction or ventricular arrhythmias. Non-fatal myocardial infarction is defined based on criteria of typical chest pain, elevated cardiac enzyme levels, and typical changes on the electrocardiogram. Revascularization is defined as percutaneous coronary intervention (PCI) with stenting or coronary artery bypass surgery (CABG). The end point was the occurrence of one MACE at follow-up.