Differential Adaptation of Biventricular Myocardial Kinetic Energy in Patients With Repaired Tetralogy of Fallot Assessed by <scp>MR</scp> Tissue Phase Mapping

The myocardial kinetic energy (KE) and its association with pulmonary regurgitation (PR) have yet to be investigated in repaired tetralogy of Fallot (rTOF) patients.To evaluate the adaptation of myocardial KE in rTOF patients by tissue phase mapping (TPM).Prospective.A total of 49 rTOF patients (23 &#177; 5 years old; male = 32), 47 normal controls (22 &#177; 1 year old; male = 29).3-T/2D dark-blood three-directional velocity-encoded gradient-echo sequence.Left and right ventricle (LV, RV) myocardial KE in radial (KEStudent&#39;s t test, multivariable regression. Statistical significance: P 0.05.In rTOF group, LV KEIn rTOF patients, the adaptation of the KE proportion occurred earlier than that of the KE amplitude, and the biventricular balance of %KE was disrupted. PR may cause differential KE adaptation in RV and LV. TPM-derived KE may be useful in investigation of myocardial adaptation in rTOF patients.2 TECHNICAL EFFICACY: Stage 3.