Blood clotting responsible for 50% of heart attack and 90% of stroke.
According to Majid Ali (a pathologist); When death occurs within six to eight hours of myocardial infarction, no acute coronary thrombotic occlusions are found at autopsy in more than 75 percent of cases; however, when death occurs after 48 hours, acute thrombotic occlusion is almost always found. The range of frequency of acute thrombotic coronary occlusion in survivors of out-of-the-hospital cardiac arrest extends from 36 percent as determined by angiography1 to 95 percent in autopsy studies.2
1. Myerburg RJ, Conde CA, Sung RJ, et al. Clinical electrophysiologic and hemodynamic profile of patients resusitated from prehospital cardiac arrest. Am J Med 1980;68:568-76.
2. Davies MJ, Thomas A. Thrombosis and acute coronary-artery lesions in sudden cardiac ischemic death. N Eng J Med 1984;310:1137-40.