4D Velocity Mapping of the Heart in rTOF Patients

Cardiac 4D MR Velocity Mapping in Repaired Tetralogy of Fallot Patients: Evaluation of Pulmonary Regurgitant Fraction and Ventricular Volume

MRI with 4D flow permits to assess the hemodynamic parameters in a parent vessel and its branches inside the same sequence.

MRI with 4D flow permits to assess the hemodynamic parameters in a parent vessel and its branches inside the same sequence. The objective of the project is to compare the regurgitant fraction in the pulmonary artery (PA) measured using 4D MR-flow and standard 2D MR-flow in repaired Tetralogy of Fallot (rTOF) patients. The consistency of the 4D flow quantization will be assessed assuming mass conservation in the pulmonary artery tree (PA flow =LeftPA flow +RightPA flow ? ).

Inclusion Criteria:

• Tetralogy of Fallot patients
• referred for clinical MRI examination
• ≥ 15 years

Exclusion Criteria:

• Anyone with a classic contraindication to MRI
• Severe obesity
• Gadolinium chelate allergy
• < 15 years
• counter-indication to MRI examination
• vulnerable person