Click on image to view larger version.

Figure 2 Coronary sinus angiogram of a cadaveric human heart. This is a vertical-axis (longitudinal) look at the heart. The dotted lines depict the segmentation of the heart into three equal parts, i.e., the basal, mid, and apical regions. This is a lateral view showing the area between the lateral marginal vein (LV) and the anterior interventricular vein (AV).