1962

Sones and Shirey (Cleveland) show how to get contrast medium into the mouths of coronary arteries (coronary arteriography) by maneuvering tip of catheter from brachial artery, under x-ray control, into immediate area of coronary orifice (Richardson, 114-115). This procedure “may have led physicians to deemphasize any role for coronary thrombosis in acute myocardial infarction,” since it revealed the gradual progression of coronary lumen narrowing in coronary atherosclerosis (Weisse, 74).