1. Phase-contrast MRI measurements will be acquired on different cross-sections of the aorta (through-plane velocity-encoding). Images will also be captured in an oblique sagittal view (in-plane velocity-encoding) to estimate the aortic vessel wall stiffness via pulse wave velocity measurements. Velocity-encoded phase-contrast MRI images will be acquired across the mitral valve to evaluate the left ventricular (LV) diastolic function through the measurement of early-to-atrial ratios. Myocardial perfusion images will be acquired after administration of gadolinium based contrast agent under pharmacological stress.