- Coronary artery disease as defined by: status post myocardial infarction (heart attack) greater than 14 days post event with no upper time limit (and followed by stress testing with additional imaging (echocardiographic or nuclear) within the 12 months prior to enrollment) and/or angiographic evidence of one or more major coronary arteries narrowing of greater than 50% and/or a history of percutaneous or surgical coronary revascularization greater than 4 months after that procedure at the time of enrollment.