Mechanism of dynamic regurgitant orifice area variation in functional mitral regurgitation
نویسندگان
چکیده
منابع مشابه
Mechanism of dynamic regurgitant orifice area variation in functional mitral regurgitation: physiologic insights from the proximal flow convergence technique.
OBJECTIVES We used the Doppler proximal flow convergence technique as a physiologic tool to explore the effects of the time courses of mitral annular area and transmitral pressure on dynamic changes in regurgitant orifice area. BACKGROUND In functional mitral regurgitation (MR), regurgitant flow rate and orifice area display a unique pattern, with peaks in early and late systole and a midsyst...
متن کاملDeterminants of regurgitant volume in mitral regurgitation: contrasting effect of similar effective regurgitant orifice area in functional and organic mitral regurgitation.
BACKGROUND Quantitative assessment of the severity of mitral regurgitation (MR) is based on the calculation of the effective regurgitant orifice (ERO), a measure of lesion severity, and of the regurgitant volume (RVol), a measure of left ventricular volume overload. We aimed at evaluating the determinants of RVol in both organic (OMR) and functional mitral regurgitation (FMR). METHODS AND RES...
متن کاملAn alternative isovelocity surface model for quantitation of effective regurgitant orifice area in mitral regurgitation with an elongated orifice application to functional mitral regurgitation.
OBJECTIVES The purpose of this study was to develop and test a simple, clinically practical alternative isovelocity surface (ISVS) model for calculating effective regurgitant orifice area (EROA) in mitral regurgitation (MR) when the regurgitant orifice is elongated, such as in functional MR. BACKGROUND Clinical experience and 3-dimensional imaging suggest that the traditional hemispheric ISVS...
متن کاملThe mechanism of decrease in dynamic mitral regurgitation during heart failure treatment: importance of reduction in the regurgitant orifice size.
OBJECTIVES The purpose of this study was to quantify and characterize the regurgitant flow pattern and regurgitant orifice area in patients undergoing therapy for severe heart failure using contemporary echocardiographic techniques. BACKGROUND Mitral regurgitation may be dynamic in patients with heart failure and ultimately correlate with outcome in a group of patients. METHODS Fourteen pat...
متن کاملDynamic aspects of acute mitral regurgitation: effects of ventricular volume, pressure and contractility on the effective regurgitant orifice area.
The dynamics of acute mitral regurgitation were studied in six open-chest dogs in whom a portion of the anterior leaflet was excised. Phasic mitral and aortic flows were measured electromagnetically and left ventricular filling volume, regurgitant volume (RV) and forward stroke volume (SV) were calculated. The systolic pressure gradient (SPG) between the left ventricle (LV) and left atrium (LA)...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 1999
ISSN: 0735-1097
DOI: 10.1016/s0735-1097(98)00570-1