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Abstract

Background: The pressure recovery-adjusted aortic valve area (AVA), called the energy loss coefficient (ELCo), is theoretically a more accurate parameter for evaluating aortic stenosis (AS) severity. The aim of this study was to compare the prognostic value of ELCo with that of conventional AVA.Methods: Indexed AVA (iAVA) was measured using Doppler echocardiography in 301 asymptomatic Japanese patients with AS and preserved left ventricular ejection fractions. Sinotubular junction diameter was also measured, and the indexed ELCo (iELCo) was calculated. Patients were followed for major cardiac events, including cardiac death, ventricular fibrillation, myocardial infarction, heart failure requiring admission, and aortic valve replacement.Results: The mean sinotubular junction diameter was 2.5 ± 0.3 cm, and >90% of patients had sinotubular junction diameters r = 0.97, P 2/m2 but mean pressure gradient Conclusions: The calculation of iELCo may not be always required, even in patients with asymptomatic AS with small aortic roots. However, this index should be calculated in patients whose AS grading assessed by iAVA is severe and in those in whom AS severity criteria are inconsistent.

Item Type:	Article
Authors/Creators:	Yoshida, H and Seo, Y and Ishizu, T and Izumo, M and Akashi, YJ and Yamashita, E and Otsuji, Y and Negishi, K and Takeuchi, M
Keywords:	aortic stenosis, aortic valve area, energy loss coefficient, prognosis
Journal or Publication Title:	Journal of the American Society of Echocardiography
Publisher:	Mosby, Inc.
ISSN:	0894-7317
DOI / ID Number:	10.1016/j.echo.2018.10.016
Copyright Information:	Copyright 2018 American Society of Echocardiography
Related URLs:	Google Scholar: Negishi, K UTAS Profile: Negishi, K
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