ANALYSIS OF LEFT AND RIGHT VENTRICULAR SIZE AND SHAPE, AS DETERMINED FROM HUMAN CASTS - DESCRIPTION OF METHOD AND ITS VALIDATION

  • 1 January 1978
    • journal article
    • research article
    • Vol. 8  (4-5) , 431-448
Abstract
A method is described to produce life-like left and right ventricular casts of 22 human hearts and to store their surface coordinates on magnetic tape for the analysis of ventricular shape and angiocardiographic volume. Experienced cardiologists divided these casts by shape into diastolic, systolic and intermediate subgroups. Based on X-ray silhouettes and computer-simulated projections, single-plane and biplane model volumes were calculated with the multiple-slices and the area-length methods for various ventricular orientations. The mean correction factors (CF), relating actual and model volumes, vary considerably with respect to cardiac phase and orientation. The systolic CF are smaller than the diastolic ones, averaging 0.74 for the left and 0.86 for the right ventricular casts. The reported CF are smaller than those published by other authors, a difference which is attributed to different cast-production procedures. The described method uses selective, equal and simultaneous filling of both ventricles, which prevents abnormal shift in the interventricular septum.

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