Scientific Abstracts - Pediatric and Congenital Heart Disease Scientific Presentations-Intracardiac 4D flow analysis of energy loss and vorticity in repaired Tetralogy of Fallot, compared to other forms of right ventricular dilation

Intracardiac 4D flow analysis of energy loss and vorticity in repaired Tetralogy of Fallot, compared to other forms of right ventricular dilation

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Video Summary

Dr. Tom Luk presented a 4D flow MRI study of repaired Tetralogy of Fallot, focusing on how pulmonary insufficiency alters right ventricular flow. Compared with other right ventricular dilation patients, Tet patients with severe pulmonary regurgitation showed distinct, localized vorticity and energy loss in the right ventricular outflow tract, especially during diastole. These flow abnormalities correlated with right ventricular enlargement, dysfunction, and reduced exercise capacity. The study suggests 4D flow can better characterize disease severity and may help guide management and timing of pulmonary valve replacement.

Keywords

4D flow MRI

Tetralogy of Fallot

pulmonary regurgitation

right ventricular outflow tract

pulmonary valve replacement