Meeting Banner
Abstract #1197

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

Julio Garcia1, Lyes Kadem2, Eric Larose1, Philippe Pibarot1

1Medicine, Laval University, Quebec, Canada; 2Concordia University, Montreal, Quebec, Canada

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.

Keywords

according acknowledgment affecting agreement among annulus aorta aortic arterial ascending assess axis bias bicuspid bland blood body cardiovascular characteristics circles classified classifying combination compute computed computing concordance confirm confirming considered consisted continuity contrast corrected correcting correction correlation corroborate cost curve curves dashed derived diastolic dichotomy discrepancies downstream effective eight equation estimation evaluate events examination examine fitted formula forty function gender good gradient grading grant guidelines health healthy heart height identified impedance improve included inconsistencies independent index indexed institutes issue limits lyes male manage mass matrix measured median medicine mild model morphology nine often orifice outcome outflow overall panel patient patients pixel plot poor powerful predicted predictor pressure proposed pumped reduced replacement represents respectively retrospective risk scanner scholarship severe severity short solid spacing spite squares stroke studied subjects surface surgery survival systemic systolic table thank threshold tract underestimates underwent upstream usefulness valve ventricle ventricular volume weeks widely years