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Table 1 Structural and functional abnormalities encountered in repaired TOF

From: Repaired tetralogy of Fallot: the roles of cardiovascular magnetic resonance in evaluating pathophysiology and for pulmonary valve replacement decision support

Structural Abnormalities Functional Abnormalities
Inherent to TOF repair RV volume overload
   Partial or complete removal of pulmonary valve tissue    Pulmonary regurgitation
   Infundibulotomy scar    Tricuspid regurgitation
   Resection of RV/infundibular muscle bundles    Left-to-right shunt
   Right atriotomy scar Ventricular septal defect
   VSD patch Atrial septal defect
Residual or recurrent lesions Aorto-pulmonary collaterals
   RV outflow tract obstruction RV pressure overload
   Main or branch pulmonary artery stenosis    RV outflow or pulmonary artery stenosis
   Ventricular septal defect    Pulmonary vascular disease
   Atrial septal defect    Pulmonary venous hypertension secondary to LV dysfunction
Acquired lesions RV systolic dysfunction
   Tricuspid valve abnormalities RV diastolic dysfunction
   RV outflow tract aneurysm LV dysfunction
   RV fibrosis Ventricular conduction delay
Associated anomalies Arrhythmias
   Dilated aorta    Atrial flutter
   Associated congenital cardiovascular anomalies    Atrial fibrillation
   Associated genetic and non-cardiac anomalies    Ventricular tachycardia
     Renal, pulmonary, musculoskeletal, neurodevelopmental abnormalities