Usefulness of Cardiovascular Magnetic Resonance to Assess Valvulo Arterial Impedance in Aortic Stenosis Patients

Julio Garcia¹, Lyes Kadem², Eric Larose¹, Philippe Pibarot¹

Valvulo arterial impedance (ZVA) is an independent and powerful predictor of poor outcome for patients with aortic stenosis (AS) severity, it is usually computed from transthoracic echocardiography (TTE) measurements. However, there are often discrepancies among the TTE measurements. Cardiovascular magnetic resonance (CMR) may be used to corroborate stenosis severity by computing effective orifice area (EOA), mean pressure gradient (MPG) and ZVA. The aim of this study is to examine the agreement of TTE and CMR for the estimation of EOA, MPG and ZVA in patients with AS. ZVA CMR using corrected MPG had a good concordance with ZVA TTE and was a good predictor of patient outcome after one year follow.