<qa>  What is the name of the symptomatic heart failure, unstable angina, myocardi- History of cardiovascular diseases in the preceding 6 months including symptomatic heart failure, unstable angina, myocardial infarction, the performance of percutaneous transluminal coronary angioplasty PTCA, or coronary artery bypass graft CABG, severe arrhythmia, or second or third degree atrioventricular AV block 