Lower maximal heart rate and total duration of exercise have been reported in patients after tetralogy of Fallot repair
compared with healthy controls,22 and lower peak exercise capacity, maximum workload, and maximum heart ratehave been reported in patients with transposition of the great arteries after arterial switch operation compared with healthy controls.23,24 Several studies have reported lower maximum oxygen uptake,7,8,10 worse performance on exercise testing,5-7 and lower activity levels9,10 in patients with CHD who have undergone SV surgical palliation compared with controls.