Assessmet of Patients With PAH Right Ventricular Volume

"The subjects will undergo a 2D echocardiography according to standard of care. An additional 5 - 10 minutes of scanning using VMS transducer attached to the echocardiography system to acquire images for 3-D reconstruction is required.~Within one day of the VMS image acquisition the subjects will also undergo cMRI according to hospital standards of care plus an additional 5 minutes to capture the PSSS required images."