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Pulmonary regurgitation measured by through-plane velocity mapping in repaired tetralogy of Fallot. (A) Cine imaging aligned with the RVOT showed no effective pulmonary valve, with unobstructed and expansile pulmonary arteries. (B) Mapping of velocities through a plane transecting the MPA showed (C) systolic forward flow, diastolic reversed flow, and late diastolic forward flow with atrial systole.
