On October 11, 1978, Byron suffered a fatal
heart attack while he was jogging with an aide alongside the
Chesapeake and Ohio Canal in western Maryland. He was pronounced dead at Washington County Hospital in
Hagerstown, at the age of 49. According to
nutritionist and longevity research pioneer
Nathan Pritikin, Byron had run six
Boston Marathons, with a best time of 3:28:40, and had not smoked for 25 years. He ignored warnings from his physician who told him that treadmill tests from 1974 to 1978 indicated his coronary arteries were gradually closing. The last treadmill test in January 1978 "indicated severe abnormality and was positive for heart disease." The physician advised Byron to stop running until further tests could be done. Dr. Manuel G. Jimenez, who did the autopsy, said Byron had "only pinprick openings" in his coronary arteries because they were filled with cholesterol. "Congressman Byron's coronary arteries were worse than most I've autopsied." ==See also==