My brother, a 30 year old TV reporter, died of a sudden heart attack in 1975. He was of moderate height and weight, and exercised regularly. His doctor told us at the funeral that my brother had had moderately elevated blood pressure, for which he was given a prescription. There was no attempt to learn what caused the high blood pressure. We were told that the very young age was not a surprise, because younger victims have not had time for capillaries to form that can reroute blocked blood flow.