Pulmonary arterial hypertension. Short axis balanced steady state free precession cine image in patient with precapillary pulmonary hypertension in diastole demonstrating right ventricular dilatation and hypertrophy as well as bulging of the interventricular septum into the small left ventricle as a sign of high pulmonary arterial pressure. The septal flattening can easily be demonstrated by echocardiography, but the biventricular mass, volumetric, and functional quantification using CMR is superior to echocardiographic estimates