Area of the aortic pressure-flow loop measures energy storage by the proximal arteries.

@article{Appleyard1988AreaOT,
  title={Area of the aortic pressure-flow loop measures energy storage by the proximal arteries.},
  author={Robert F. Appleyard and Kenneth B. Campbell and John A. Ringo},
  journal={The American journal of physiology},
  year={1988},
  volume={255 6 Pt 2},
  pages={H1405-12}
}
We show that power measured by the area of the pressure-flow loop (APQ) is directly proportional to reactive power [Im(W)], which measures pulsatile energy storage in the proximal arteries. Analytically, Im(W) differs from APQ by K.2 pi, where K is a postulated constant of proportionality. To determine the value of K, 338 heartbeats obtained from 8 dogs under a wide range of hemodynamic conditions were analyzed. The relationship between APQ and Im(W) remained highly linear (r = 0.98), and the… CONTINUE READING

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