FIG. 1.

Block diagram of the experiment. The bolus of injectate introduced at I (pulmonary artery or left ventricle) is somewhat dispersed in the vascular system by the process h_IA(t) before it reaches the three aortic sampling sites A, B, and C. The sampling system transport functions, h_s(t), were identical, so that the transport functions $h_{\mathrm{AB}}^{\prime }\left(t\right)$, $h_{\mathrm{BC}}^{\prime }\left(t\right)$, or $h_{\mathrm{AC}}^{\prime }\left(t\right)$ between pairs of the simultaneously recorded curves A_s, B , and C_s, would be the same as the transport functions h_AB, h_BC, or h_AC between the corresponding pairs of the actual arterial curves.