Quantification of mitral regurgitation with amplitude-weighted mean velocity from continuous wave Doppler spectra.
نویسندگان
چکیده
منابع مشابه
Quantification of mitral regurgitation with amplitude-weighted mean velocity from continuous wave Doppler spectra.
Amplitude-weighted mean velocity from continuous wave (CW) Doppler spectra was used to measure aortic flow (QAo) and left ventricular mitral inflow (QLVin). These flows were used to quantify mitral regurgitation fraction: RFm = (QLVin-QAo).QLVin-1.100(%).QLVin was calculated from the diastolic time integral of amplitude-weighted mean velocity that was derived from CW spectra with the transducer...
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BACKGROUND The time constant of isovolumic relaxation (tau) is an important parameter of ventricular diastolic function, but the need for invasive measurement with high-fidelity catheters has limited its use in general clinical cardiology. The Doppler mitral regurgitant velocity spectrum can be used to estimate left ventricular (LV) pressure throughout systole and may provide a new noninvasive ...
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ژورنال
عنوان ژورنال: Circulation
سال: 1989
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.79.6.1294