Coronary angiographic and morphologic correlation.

Necropsy and, more recently, physiologic studies have demonstrated the limitations of coronary angiography in estimating the percentage of luminal narrowing due to atherosclerotic plaque. Necropsy studies have also confirmed that coronary arterial spasm is typically associated with fixed atherosclerotic stenoses. Finally, necropsy studies of individual patients have clarified certain points regarding thrombolytic therapy, coronary "collateral" blood flow, myocardial bridges, and coronary arterial dissection.