This paper analyzes the volume curves of the cardiac chambers in the cardiac cycle. Volume curves were measured from the cardiac CT test case reconstructed at 6 different phases. The ventricular and atrial volume curves were then interpolated and applied to an anthropomorphic analytical model human heart. The volume curves modify the analytical model at any given point of the cardiac phase creating a highly detailed model of a beating ventricular cycle. This model can be used in analytic projections simulating acquisition of a CT scanner and help study the temporal resolution and motion artifacts of image reconstruction techniques.