The anterior and posterior interventricular sulci are shallow grooves on the front and underside of the heart that mark where the interventricular septum lies inside. They run from the coronary sulcus towards the apex and carry important coronary vessels.
| Location | Anterior sulcus on the sternocostal surface; posterior (inferior) sulcus on the diaphragmatic surface; they meet near the apex at the cardiac notch |
|---|---|
| Parts |
|
| Nerve Supply | Cardiac plexus |
| Blood Supply | Anterior interventricular (left anterior descending) artery; Posterior interventricular (posterior descending) artery |
| Venous drainage | |
| Lymphatic drainage |
|
Mark the external position of the interventricular septum and carry the arteries that supply it.
The left anterior descending artery in the anterior sulcus is the most common site of serious coronary blockage and is often bypassed with the left internal thoracic artery. Which artery feeds the posterior interventricular artery defines coronary dominance (right dominant in most people).
Blockage of the left anterior descending artery in the anterior sulcus, damaging the front wall and septum of the left ventricle.
Blockage of the vessel running in the posterior sulcus, damaging the inferior wall and septum.
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