- Patient with established coronary artery disease such as stable angina; history of myocardial infarction; history of percutaneous coronary intervention (PTCA with or without stent placement); coronary stenosis on angiography; history of unstable angina or non-Q wave myocardial infarction; history of coronary artery bypass graft surgery (CABG); positive MIBI scan. Patients have to be in a stable medical condition.