Postmortem coronary angiography and dissection of hearts from 105 United States soldiers killed in Vietnam demonstrate that (1) 45% have some evidence of atherosclerosis; (2) 5% have gross evidence of severe coronary atherosclerosis; and (3) no patient had angiographic evidence of severe coronary narrowing, and in only one patient was any degree of stenosis observed.
McNamara JJ, Molot MA, Stremple JF, Cutting RT. Coronary Artery Disease in Combat Casualties in Vietnam. JAMA. 1971;216(7):1185-1187. doi:10.1001/jama.1971.03180330061012