Figure 1.

The septal artery. Internal casts of the left ventricle and the coronary arteries of C57BL/6J mice. Frontal views. (A) The septal artery and the right coronary artery arise from a common ostium in the right aortic sinus. (B) The septal artery originates from a separate ostium (arrowhead) in the left aortic sinus, close to the ventral commissure (asterisk), whereas the right coronary ostium (arrow) displays a high take‐off. (C) A septal artery originates from the right coronary artery and another from the left coronary artery. In both cases, the septal artery and the right or left coronary artery arise from a common ostium in the right and left aortic sinuses. Ao, aorta; LC, left coronary artery; LV, left ventricle; RC, right coronary artery; S, septal artery. Scale bars: 100 μm. (Reprinted from Fernández et al. 2008.)