A noninvasive method of measuring wave intensity, a new hemodynamic index: application to the carotid artery in patients with mitral regurgitation before and after surgery

@article{Niki1999ANM,
  title={A noninvasive method of measuring wave intensity, a new hemodynamic index: application to the carotid artery in patients with mitral regurgitation before and after surgery},
  author={Kiyomi Niki and M. Sugawara and Keisuke Uchida and Rie Tanaka and Kyomi Tanimoto and Hitoshi Imamura and Yasunari Sakomura and Naoko Ishizuka and Hitoshi Koyanagi and Hiroshi Kasanuki},
  journal={Heart and Vessels},
  year={1999},
  volume={14},
  pages={263-271}
}
Wave intensity (WI) is a new hemodynamic index, which is defined as (dP/dt)(dU/dt) at any site of the circulation, where dP/dt and dU/dt are the time derivatives of blood pressure and velocity, respectively. Arterial WI in normal subjects has two positive sharp peaks. The first peak occurs during early systole when a forward-traveling compression wave is generated by the left ventricle. The magnitude of this peak increases markedly with an increase in cardiac contractility. The second peak… CONTINUE READING
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