title: Exercise tolerance after repair of tetralogy of Fallot.
abstract: Twelve patients who had undergone complete repair of tetralogy of Fallot at ages ranging from 8 to 27 years were studied for exercise tolerance several years later. Work performance ranged from 58 to 130% of that predicted. Increased physiological dead space and alveolar-arterial Po2 difference at exercise suggested pulmonary vascular disease, which was confirmed in 1 patient by pulmonary angiography. Excercise tolerance decreased with increasing age at time of repair, underlining the desirability of early corrective operation.
mesh_terms: D000136:Acid-Base Equilibrium; D000293:Adolescent; D000328:Adult; D002245:Carbon Dioxide / Q000097:blood; D002648:Child; D004562:Electrocardiography; D005080:Exercise Test; D005260:Female; D005500:Follow-Up Studies; D006321:Heart / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D010101:Oxygen Consumption; D005082:Physical Exertion; D012119:Respiration; D012129:Respiratory Function Tests; D013771:Tetralogy of Fallot / Q000503:physiopathology / Q000601:surgery*
chemical_list: D002245:Carbon Dioxide