Evaluation of patients with tetralogy of fallot by cardiac MRI after complete surgical repair in Rajaei heart center, Tehran, Iran

Tetralogy of Fallot is the most common type of cyanotic congenital heart disease. The underlying mechanisms that contribute to heart dysfunction in patients with repaired tetralogy of Fallot are incompletely understood. In this study, the cardiac function indexes and residual complications after Fallot tetralogy complete surgical repair was evaluated.

In this cross-sectional study, clinical data and information obtained from cardiac magnetic resonance (CMR) gathered from 150 consecutive patients with repaired tetralogy of Fallot. Cardiac function indexes and residual complications evaluated in the patients.

Mean age of patients was 22.5±9.6 years. 60 patients (40%) were female and 90 patients (60%) were female. Mean of Left ventricular Ejection Fraction and mean of Right ventricular Ejection Fraction was 54.9±7.5 and 38.6±8.3 percent, respectively. Left ventricular Dilatation in 19 (12.7%) and Right ventricular Dilatation in 141 (94%) patients was observed. RVOT dilatation in 143 (95.3), residual pulmonary stenosis in 39 (26%), ASD (Atrial Septal Defect) in 1 (0.7%), VSD (Ventricular Septal Defect) in 40 (26.7%), PDA (Patent ductus arteriosus) in 11 (7.3%) and Delayed Enhancement of RVOT in 125 (83.3%) patients was positive.

Residual complications following repair of tetralogy of Fallot, especially in the right ventricle, are common and CRM may be a diagnostic instrument for follow-up in patients with congenital heart disease after repairing surgery.