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Exercise tolerance tests were performed using treadmill in 21 patients with tetralogy of Fallot (TOF) repaired earlier (4.8 years in mean) and 10 subjects with small ventricular septal defect or normal heart, aged 8-16 years. Pre and postexercise echocardiography and cardiac catheterization were also performed and the hemodynamic data were compared with exercise parameters. The following results were obtained. 1)... |