Aortic valve area calculation in aortic stenosis by CT and Doppler echocardiography.

JACC. Cardiovascular Imaging
Marie-Annick ClavelMaurice Enriquez-Sarano

Abstract

The aim of this study was to verify the hypothesis that multidetector computed tomography (MDCT) is superior to echocardiography for measuring the left ventricular outflow tract (LVOT) and calculating the aortic valve area (AVA) with regard to hemodynamic correlations and survival outcome prediction after a diagnosis of aortic stenosis (AS). MDCT demonstrated that the LVOT is noncircular, casting doubt on the AVA measurement by 2-dimensional (2D) echocardiography. A total of 269 patients (76 ± 11 years of age, 61% men) with isolated calcific AS (mean gradient 44 ± 18 mm Hg; ejection fraction 58 ± 15%) underwent Doppler echocardiography and MDCT within the same episode of care. AVA was calculated by echocardiography (AVAEcho) and by MDCT (AVACT) using each technique measurement of LVOT area. In the subset of patients undergoing dynamic 4-dimensional MDCT (n = 135), AVA was calculated with the LVOT measured at 70% and 20% of the R-R interval and measured by planimetry (AVAPlani). Phasic measurements of the LVOT by MDCT yielded slight differences in eccentricity and size (all p < 0.001) but with excellent AVA correlation (r = 0.92, p < 0.0001) and minimal bias (0.05 cm(2)), whereas the AVAPlani showed poor correlations with all ot...Continue Reading

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Citations

Feb 18, 2016·Der Internist·H Ten Freyhaus, S Baldus
Mar 17, 2015·JACC. Cardiovascular Imaging·Frank A Flachskampf
Sep 24, 2015·Current Treatment Options in Cardiovascular Medicine·Romain Capoulade, Philippe Pibarot
May 18, 2016·European Heart Journal·Marie-Annick ClavelPhilippe Pibarot
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