Quantification of Mitral Regurgitation Using 4D MRI Flow : Comparison With 2D MRI Flow and Echocardiography Using the Evolution of Left Ventricular Remodeling as a Reference

Routine ultrasound examination with standardized recordings for the study, incorporating volumetric assessment techniques

A cardiac MRI will be performed on a 1.5 Tesla system, including a biventricular function study with a series of short-axis slices, three long-axis slices, a 2D phase-contrast acquisition orthogonal to the aortic root. Additionally, standard T1 mapping sequences will be acquired on three short-axis slices, 15 minutes after the injection of 0.2 mmol/kg of body weight of gadolinium, for myocardial and blood T1 measurements.

A sagittal 4D flow acquisition lasting between 6 and 10 minutes of free breathing to cover all four cardiac chambers is added to the 2D acquisition.

Ultrafast sequences are added to the standard echocardiography acquisition.