 iv CMR protocol: All subjects will be imaged on a 1.5T Philips Intera MRI Scanner with dedicated 32 channel cardiac coil. MRI protocol will include a plan scan, SENSE reference scan, interactive scan to identify 4 chamber, 2 chamber long axis and short axis geometries of the heart. Breath hold Steady State Free Procession 4 chamber, 2 chamber and short axis stack 1.5mm, 1.5mm, 10mm cine 30 cardiac phases will be acquired. Ventricular mass will be calculated using a viewforum work station Philips Healthcare by delineating the diastolic left ventricular endocardial and epicardial bordersfigure 2. 