[Clinical significance of exercise-induced extrasystole].
D000293:Adolescent; D000328:Adult; D000368:Aged; D005117:Cardiac Complexes, Premature / Q000503:physiopathology*; D003327:Coronary Disease / Q000503:physiopathology; D004562:Electrocardiography; D005080:Exercise Test; D006801:Humans; D008875:Middle Aged