The heart of the 500 mile race.
D000328:Adult; D001145:Arrhythmias, Cardiac / Q000209:etiology*; D001334:Automobile Driving; D003327:Coronary Disease / Q000150:complications; D003645:Death, Sudden; D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D013022:South Carolina; D013178:Sports Medicine; D013312:Stress, Physiological; D013315:Stress, Psychological; D013610:Tachycardia / Q000209:etiology