Percentage of Left Ventricular Stroke Work Loss
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چکیده
منابع مشابه
Percentage of Left Ventricular Stroke Work Loss
The ratio of the mean systolic transaortic valvular gradient to the mean systolic left ventricular pressure times 100 yields a percentage that represents the portion of left ventricular pressure-volume work per stroke lost because of outflow-tract obstruction. The percentage of the left ventricular stroke work loss and the area of the aortic orifice have been estimated in 49 patients with aorti...
متن کاملDoppler echocardiography markedly underestimates left ventricular stroke work loss in severe aortic valve stenosis.
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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متن کاملquantification of aortic regurgitation severity by left ventricular to right ventricular stroke volume ratio
background: echocardiography is the most common test used for the evaluation of aortic regurgitation (ar). however, the role of echocardiography as an available and inexpensive method in the quantification of ar by the left ventricle to right ventricle stroke volume ratio (lv/rv sv ratio) has not been completely investigated. methods: between june 2005 and december 2007, 132 consecutive patient...
متن کاملPercentage of shortening of the echocardiographic left ventricular dimension. Its use in determining ejection fraction and stroke volume.
The percentage of shortening of the echocardiographic left ventricular dimension (% delta D) was prospectively evaluated in 42 patients without detectable asynergy during diagnostic cardiac catheterization and was found to correlate well with angiographic ejection fraction (r = 0.90). Ejection fraction was calculated as the product of % delta D X 1.7 or as % delta (D2), both formulae having sim...
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ژورنال
عنوان ژورنال: Circulation
سال: 1967
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.35.5.868