Management of Tetralogy of Fallot

Initial Management and Long-Term Surveillance

The American Heart Association recommends that all patients with repaired Tetralogy of Fallot require lifelong annual follow-up with an adult congenital heart disease specialist, with comprehensive imaging to monitor for pulmonary regurgitation, RV dysfunction, and arrhythmias—the primary determinants of long-term morbidity and mortality 1, 2
Complete surgical repair should address all four anatomic components simultaneously, including VSD closure, RVOT obstruction relief, pulmonary valve management, and extracardiac conduit placement when necessary 3
The American College of Cardiology recommends that every patient requires annual evaluation including history and physical examination by ACHD cardiologist, 12-lead ECG, comprehensive echocardiography, and cardiac MRI for precise RV volume quantification and pulmonary regurgitation assessment 1, 2, 3, 5

The American Heart Association recommends that periodic Holter monitoring should be performed, with frequency individualized based on hemodynamics and clinical suspicion, to detect exertional arrhythmias and prevent sudden cardiac death 7, 6
For documented sustained ventricular tachycardia or cardiac arrest, implantable cardioverter defibrillator placement is mandatory, with preoperative EP testing and catheter ablation in the catheterization laboratory 6, 8

Reoperation is indicated for symptomatic patients with severe pulmonary regurgitation, asymptomatic patients with severe pulmonary stenosis or pulmonary regurgitation plus progressive or severe RV enlargement or dysfunction, and residual RVOT obstruction with RV/LV pressure ratio >0.7 7, 6
Pulmonary valve replacement is the most common reintervention, with heterograft or homograft preferred, and mechanical PVR only for patients requiring warfarin for other indications 1, 4, 3

The American College of Cardiology recommends that comprehensive echocardiography assessing RV size/function, pulmonary regurgitation severity, residual RVOT obstruction, tricuspid regurgitation, and aortic root dilation should be obtained preoperatively 5
Intraoperative goals include maintaining RV function by optimizing preload, reducing afterload, and supporting contractility, with defibrillator immediately available with antiarrhythmic medications prepared 5