Aortic Valve Area Calculation in Aortic Stenosis by CT and Doppler Echocardiography
| Autor: | Phillip A. Araoz, Maurice Enriquez-Sarano, Joseph Malouf, Hector I. Michelena, Marie-Annick Clavel, David Messika-Zeitoun |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
multidetector CT
medicine.medical_specialty medicine.diagnostic_test business.industry aortic valve stenosis Aortic area Multidetector ct Doppler echocardiography medicine.disease survival 3. Good health Stenosis Radiology Nuclear Medicine and imaging Aortic valve stenosis Multidetector computed tomography cardiovascular system diagnostic method echocardiography Medicine Ventricular outflow tract Radiology Nuclear Medicine and imaging cardiovascular diseases Radiology Cardiology and Cardiovascular Medicine business Nuclear medicine |
| Zdroj: | JACC: Cardiovascular Imaging. 8:248-257 |
| ISSN: | 1936-878X |
| DOI: | 10.1016/j.jcmg.2015.01.009 |
| Popis: | ObjectivesThe 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).BackgroundMDCT demonstrated that the LVOT is noncircular, casting doubt on the AVA measurement by 2-dimensional (2D) echocardiography.MethodsA 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).ResultsPhasic 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 cm2), whereas the AVAPlani showed poor correlations with all other methods (all r values |
| Databáze: | OpenAIRE |
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