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Background Patients having aortic stenosis will invariably develop left ventricular hypertrophy (LVH) secondary to the increased left ventricular (LV) pressure. This normal compensatory process to accommodate afterload over time impairs diastolic function. LV diastolic function represents, amongst many, the relationship between left ventricular inflow velocities and left atrial pressure. We have previously shown that Cardiac MRI (CMR) can evaluate diastolic function using the phase velocity mapping (PVM) sequence with high accuracy as compared to the traditional modality, Echocardiography. The CMR approach for diastolic function is fast, efficient and reproducible. Using CMR, the impact of relief of pressure afterload on diastolic function metrics following aortic valve replacement (AVR) for patients with aortic stenosis is currently not known.

405 Does diastolic function improve after the left ventricular pressure afterload is removed?