The development of a real-time microcomputer-based system for generating left ventricular pressure-volume diagrams enables instant evaluation of ventricular hemodynamics.
May enable real-time LV hemodynamic assessment during procedures; leaves open need for validation before clinical adoption.
Using three intraventricular diameter signals obtained from ultrasonic distance gauges and applying the general ellipsoid model to the left ventricle, it was possible to obtain the left ventricular volume signal. Implanting a miniature transducer in the left ventricle the pressure signal was attained. With these two signals the pressure-volume diagrams were constructed on line, and ventricular function during load manoeuvres could be studied from them. Because the whole process was done on line, using a microcomputer, the performance of the left ventricle to load manoeuvres in different conditions could be seen instantly.
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Forteza et al. (1986) studied this question.
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