Graphical estimation of ventricular wall force and stress from pressure-volume diagram.
A graphical method is proposed for assessment of ventricular wall circumferential total force and mean stress from the ventricular pressure-volume diagram. A family of force or stress isopleths are first drawn in the pressure-volume plane using a geometric model of the left ventricle and an appropriate version of the Laplace equation. A pressure-volume loop of the ventricle to be analyzed is then drawn in this pressure-volume plane. Total circumferential force in the ventricular wall or its mean circumferential stress can now be read directly from the intersections of the pressure-volume loop with the force or stress isopleths.
D002306:Cardiac Volume; D006321:Heart / Q000502:physiology*; D008433:Mathematics; D008954:Models, Biological; D011312:Pressure; D016276:Ventricular Function