Management of Tetralogy of Fallot

Definitive Surgical Repair

The American Heart Association recommends that all patients with Tetralogy of Fallot require complete surgical repair addressing all four anatomic components: VSD closure, RVOT obstruction relief, pulmonary valve management, and extracardiac conduit placement when necessary, ideally within the first year of life 1
Surgeons with specialized training and expertise in congenital heart disease must perform all operations in TOF patients, as this directly impacts morbidity and mortality outcomes 2
The surgical approach typically involves infundibulotomy, resection of obstructive muscle bundles, and patch enlargement of the pathway from right ventricle to pulmonary arteries 3
Coronary artery anatomy must be definitively established before any operative intervention, specifically identifying anomalous anterior descending coronary arteries crossing the RVOT to prevent catastrophic coronary injury 2, 4

The American College of Cardiology recommends that every patient requires annual evaluation by an adult congenital heart disease (ACHD) specialist for life, as 35-year survival is approximately 85% but residual lesions are nearly universal 2
Comprehensive echocardiography assessing RV size/function, pulmonary regurgitation severity, residual RVOT obstruction, tricuspid regurgitation, and aortic root dilation is necessary 3
Cardiac MRI for precise RV volume quantification and pulmonary regurgitation assessment is the reference standard and echocardiography commonly underestimates these parameters 3

The American College of Cardiology recommends pulmonary valve replacement (surgical or percutaneous) for symptomatic patients with moderate or greater pulmonary regurgitation and cardiovascular symptoms not otherwise explained 3
Pulmonary valve replacement is strongly indicated in asymptomatic patients with moderate or greater pulmonary regurgitation plus any of the following: moderate to severe RV dysfunction, moderate to severe RV enlargement, development of symptomatic or sustained atrial and/or ventricular arrhythmias, or moderate to severe tricuspid regurgitation 2, 3

The American College of Cardiology recommends implantable cardioverter defibrillator placement for documented sustained ventricular tachycardia or cardiac arrest 1
Primary prevention ICD therapy is strongly indicated in adults with TOF and multiple risk factors for sudden cardiac death, including QRS duration >180 ms, severe RV dysfunction, or LV ejection fraction ≤35% with NYHA class II-III symptoms 3
Programmed ventricular stimulation can risk-stratify adults with TOF and additional risk factors for sudden cardiac death 3

The American College of Cardiology recommends cardiac catheterization with angiography when adequate hemodynamic data cannot be obtained noninvasively, specifically for assessment in the setting of arrhythmia, heart failure, unexplained ventricular dysfunction, suspected pulmonary hypertension or cyanosis, or coronary artery compression testing before RV-to-PA conduit stenting or transcatheter valve placement 2, 3