Transaortic Flow in Aortic Stenosis: Stroke Volume Index versus Flow Rate
نویسندگان
چکیده
منابع مشابه
Transvalvular Volume Flow Rate in Valvular Aortic Stenosis
Background Valve areas derived by the Gorlin formula have been observed to vary with transvalvular volume flow rate. Continuity equation valve areas calculated from Doppler-echo data have become a widely used alternate index of stenosis severity, but it is unclear whether continuity equation valve areas also vary with volume flow rate. This study was designed to investigate the effects of chang...
متن کاملResting Aortic Valve Area at Normal Transaortic Flow Rate Reflects True Valve Area in Suspected Low-Gradient Severe Aortic Stenosis.
OBJECTIVES This study sought to assess the diagnostic impact of stress echocardiography (SE) in patients with suspected low-flow, low-gradient aortic stenosis but normal resting transvalvular flow rate. BACKGROUND SE may help to distinguish between true severe aortic stenosis and pseudosevere aortic stenosis in patients with low aortic valve area (AVA) and mean gradient. However, if rest flow...
متن کاملAortic stenosis: flow matters.
The presence of a low transvalvular pressure gradient (<40 mmHg) in conjunction with a small aortic valve area (AVA ≤1 cm) is a challenging situation as it raises uncertainty about the actual severity of aortic stenosis (AS) and therefore about the indication of aortic valve replacement (AVR) if the patient is symptomatic. This lowgradient ‘severe’ (small AVA) AS entity may in fact be related t...
متن کاملThe relation between transaortic pressure diVerence and flow during dobutamine stress echocardiography in patients with aortic stenosis
Objective—To investigate the relation between transaortic pressure diVerence and flow in patients with aortic stenosis. Methods—50 asymptomatic patients with all grades of aortic stenosis were studied using dobutamine stress echocardiography. Individual plots of mean pressure drop against flow were drawn. Comparisons were made between grades of aortic stenosis as defined by the continuity equat...
متن کاملSurvival by stroke volume index in patients with low-gradient normal EF severe aortic stenosis.
OBJECTIVE Low-gradient (LG) severe aortic stenosis (AS) and preserved EF with reduced stroke volume are associated with an adverse prognosis, but the relationship of stroke volume index (SVI) with mortality among a range of values is unknown. We investigated the prognostic impact of SVI in this population. METHODS We examined 405 consecutive patients with preserved EF (≥50%) and severe AS (va...
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ژورنال
عنوان ژورنال: Cardiology
سال: 2018
ISSN: 0008-6312,1421-9751
DOI: 10.1159/000494051