Dobutamine Stress Echocardiography in Low‐Flow, Low‐Gradient Aortic Stenosis: Flow Reserve Does Not Matter Anymore
نویسندگان
چکیده
منابع مشابه
Dobutamine stress echocardiography in patients with low-gradient aortic stenosis.
In adults with moderate or severe aortic stenosis (AS), valve replacement surgery is recommended when symptoms (ie, angina, syncope, or congestive heart failure) appear.1 In such patients, valve replacement surgery alleviates symptoms and improves survival, even in those with a depressed left ventricular ejection fraction (LVEF). Although a minority of patients with symptomatic AS have a reduce...
متن کاملCoronary Flow Velocity Reserve during Dobutamine Stress Echocardiography
BACKGROUND A coronary flow velocity reserve (CFVR)≥2 is adequate to infer a favorable prognosis or the absence of significant coronary artery disease. OBJECTIVE To identify parameters which are relevant to obtain CFVR (adequate or inadequate) in the left anterior descending coronary artery (LAD) during dobutamine stress echocardiography (DSE). METHODS 100 patients referred for detection of ...
متن کاملCoronary flow reserve improves after aortic valve replacement for aortic stenosis: an adenosine transthoracic echocardiography study.
OBJECTIVES The goal of this study was to assess coronary flow reserve (CFR) before and after aortic valve replacement (AVR). BACKGROUND Coronary flow reserve is impaired under conditions of left ventricular (LV) hypertrophy. It is not known whether CFR improves with regression of LV hypertrophy in humans. METHODS We investigated 35 patients with pure aortic stenosis, LV hypertrophy and norm...
متن کاملCoronary flow reserve during dobutamine stress in Takotsubo stress cardiomyopathy
OBJECTIVES Takotsubo stress cardiomyopathy (TSC) is an increasingly recognised and diagnosed disease, although the underlying pathophysiology is still unknown. Our aim was to investigate the effect of the catecholamine dobutamine on coronary flow reserve (CFR) measured non-invasively in patients with TSC and controls. Our hypothesis was that dobutamine stress can induce microvascular dysfunctio...
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...
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ژورنال
عنوان ژورنال: Journal of the American Heart Association
سال: 2019
ISSN: 2047-9980
DOI: 10.1161/jaha.119.012212