Evaluation of pulmonary regurgitation by using different cardiac magnetic resonance indices in children with repaired tetralogy of Fallot

To the Editor:Nowadays,most infants with tetralogy of Fallot(TOF)survive the initial surgical repair;however,they continue to experience residual hemodynamic and physiologic abnormalities in the follow-up.[1]Pulmonary regurgitation(PR)is still recognized as the most common complication that determines late outcomes.PR may result in right ventricular(RV)dilatation and,ultimately,cardiac dysfunction.Indicators of deterioration of clinical status such as impaired exercise tolerance,ventricular arrhythmia,and sudden cardiac death have all been associated with chronic PR.