Estimation of volume flow rate by surface integration of velocity vectors from color Doppler images

Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography
Y SunB Wranne

Abstract

A new Doppler echocardiographically based method has been developed to quantify volume flow rate by surface integration of velocity vectors (SIVV). Electrocardiographic-gated color Doppler images acquired in two orthogonal planes were used to estimate volume flow rate through a bowl-shaped surface at a given time and distance from the probe. To provide in vitro validation, the method was tested in a hydraulic model representing a pulsatile flow system with a restrictive orifice. Accurate estimates of stroke volume (+/- 10%) were obtained in a window between 1.2 and 1.6 cm proximal to the orifice, just before the region of prestenotic acceleration. By use of the Bernoulli's equation, the estimated flows were used to generate pressure gradient waveforms across the orifice, which agreed well with the measured flows. To demonstrate in vivo applicability, the SIVV method was applied retrospectively to the determination of stroke volume and subaortic flow from the apical three-chamber and five-chamber views in two patients. Stroke volume estimates along the left ventricular outflow tract showed a characteristic similar to that in the in vitro study and agreed well with those obtained by the Fick oxygen method. The region where accura...Continue Reading

References

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Citations

Mar 21, 2000·Ultrasound in Medicine & Biology·M S ChewJ M Hasenkam
Dec 21, 2011·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·Shuping Ge
May 1, 1997·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·W Y KimP K Paulsen
Jun 24, 2004·Echocardiography·Beomjin KimJames Robergé
Jan 24, 2015·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Stephen Z PinterJ Brian Fowlkes
Jul 10, 1998·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·G Van CampJ L Vandenbossche
May 11, 2000·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·S BergS Samstad
Dec 16, 2017·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Stephen Z PinterJonathan M Rubin
Sep 26, 2006·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Oliver D KripfgansJ Brian Fowlkes
Oct 27, 2009·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Kenneth HoytMichelle L Robbin
Aug 10, 2020·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Jonathan M RubinStephen Z Pinter
Dec 1, 2012·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Stephen Z PinterJ Brian Fowlkes

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