Sudden cardiac death (SCD) is a major health problem in the United States with upwards of 500,000 cardiovascular deaths each year. The SCD patients are usually those healthy persons who die suddenly without experiencing any symptom. The cause is usually sudden onset of ventricular fibrillation (VF). Survival is very poor with most studies showing about 15% of successfully resuscitated patients leaving the hospital neurologically intact. The presumed cause of this sudden collapse is myocardial ischemia but there is little evidence to support this proposition. The majority of SCD patients have coronary atherosclerosis on post mortem examination. However, ischemia takes time to develop and SCD occurs too quickly to be caused by ischemia.
Read more at Sudden Cardiac Death is not Caused by Ischemia