The Doppler VTI method in estimating stroke volume and cardiac output correlates well with results of concurrent thermodilution cardiac output determinations in patients without significant left-sided valvular regurgitation.
* LVOT VTI
SV * HR
Left ventricular outflow tract diameter (mm)
LVOT subvalvular velocity time integral (cm)
Heart rate (bpm)
Stroke Volume (mL)
Cardiac Output (L/min)
Huntsman LL, et al. Noninvasive Doppler determination of cardiac output in man-clinical validation. Circulation 1983; 106:1057-1065.
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