Quantitative Mitral Valvular Regurgitation Hemodynamics Analysis Using 4D flow MRI and Echocardiography: Characteristics of Flow Momentum

Quantitative hemodynamic assessment of mitral valvular regurgitation (MVR) is critical for evaluating severity of the disease, but has been challenging with conventional echocardiographic and cardiac MRI techniques. 4D flow MRI is a promising tool that enables direct retrospective quantification of MVR hemodynamics. This study proposes a regurgitant flow momentum as a novel and reliable fluid dynamic parameter for MVR assessment using 4D flow MRI. The conservation characteristics of MVR jet flow momentum and its relationship with LA enlargement were investigated in 44 patients using 4D flow MRI and echocardiography.