STUDIES ON ELECTROCARDIOGRAM DURING EXERCISE.
D000293:Adolescent; D003327:Coronary Disease; D004562:Electrocardiography; D006801:Humans; D009203:Myocardial Infarction; D005082:Physical Exertion
ADOLESCENCE; CORONARY DISEASE; ELECTROCARDIOGRAPHY; EXERTION; MYOCARDIAL INFARCT