The power-velocity integral at the vena contracta: A new method for direct quantification of regurgitant volume flow.

@article{Buck2000ThePI,
  title={The power-velocity integral at the vena contracta: A new method for direct quantification of regurgitant volume flow.},
  author={Tamsin Buck and Ronald A. Mucci and J. Luis Guerrero and Godtfred Holmvang and Mark D. Handschumacher and Robert A. Levine},
  journal={Circulation},
  year={2000},
  volume={102 9},
  pages={1053-61}
}
BACKGROUND Noninvasive quantification of regurgitation is limited because Doppler measures velocity, not flow. Because backscattered Doppler power is proportional to sonified blood volume, power times velocity should be proportional to flow rate. Early studies, however, suggested that this held only for laminar flow, not for regurgitant jets, in which turbulence and fluid entrainment augment scatter. We therefore hypothesized that this Doppler power principle can be applied at the proximal vena… CONTINUE READING
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