Clinical Implication of Energy Loss Coefficient in Patients With Severe Aortic Stenosis Diagnosed by Doppler Echocardiography
نویسندگان
چکیده
منابع مشابه
Clinical implication of energy loss coefficient in patients with severe aortic stenosis diagnosed by Doppler echocardiography.
BACKGROUND The Doppler-derived energy loss coefficient (ELCo), which can take into account the pressure recovery phenomenon and reconcile discrepancies between the aortic valve effective orifice area (EOA) obtained by the Gorlin formula using a catheter (EOAcath) and the EOA obtained by the Doppler continuity equation (EOADop), is proposed as an equivalent index to represent EOAcath. Therefore,...
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BACKGROUND The aim of this study was to evaluate the relationship between aortic valve area (AVA) obtained by Doppler echocardiography and outcome in patients with severe asymptomatic aortic stenosis and to define a specific threshold of AVA for identifying asymptomatic patients at very high risk based on their clinical outcome. METHODS AND RESULTS We included 199 patients with asymptomatic s...
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AIMS Exercise stress testing (EST) is recommended by guidelines to risk-stratify patients with asymptomatic valvular aortic stenosis (AS), though the role of quantitative exercise-Doppler echocardiography has rarely been studied. This prospective study sought to correlate standard EST results with the haemodynamic measurements made during exercise by Doppler echocardiography. METHODS AND RESU...
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AIMS Left ventricular (LV) stroke work loss (SWL) is an index of aortic stenosis (AS) severity based on the energy loss concept. Traditionally known as an invasive measurement, SWL has also been determined noninvasively using Doppler echocardiography. The present work was done to compare the echocardiographic estimate against the standard invasive SWL. METHODS AND RESULTS We determined SWL in...
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Aortic stenosis (AS) is the most frequent valvular heart disease in west developed and developing countries, with prevalence between 0.02% in adults under 44 years and 3-9% in elderly over 80 years. Patients with this disease may remain asymptomatic for years, particularly in elderly with naturally limited exercise. If the patients remain untreated after they become symptomatic, the mortality a...
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ژورنال
عنوان ژورنال: Circulation Journal
سال: 2008
ISSN: 1346-9843,1347-4820
DOI: 10.1253/circj.721723