Relation of unstable angina and myocardial infarction to progression of coronary narrowing in patients undergoing coronary artery bypass grafting (utilizing an internal mammary artery).

We examined the relation of an ischemic syndrome with the progression of coronary disease early (<3 years) after multiple bypass grafting utilizing an internal mammary artery and saphenous vein grafts. Data indicate that an ischemic syndrome is associated with progression of native coronary disease distal to the graft or total occlusion of the saphenous vein graft in most cases.