Anterior two-thirds of the interventricular septum
Territory
The muscular septum from the membranous part to the apex, carrying the bundle branches; the posterior third belongs to the posterior descending artery.
Traced from the start
- Left (posterior) aortic sinus and left main stem
- Left anterior descending (anterior interventricular) artery
- Septal perforating branches of the LAD
- Anterior two-thirds of the interventricular septum
Detail
- Supplied by
- Septal perforators of the LAD
- Leads
- V1 and V2 (septal)
When it goes wrong
Septal infarction on day 3 to 7
Ventricular septal rupture: new harsh pansystolic murmur at the left sternal edge with a thrill, and a step-up in oxygen saturation from right atrium to right ventricle
Practise this structure
1 question in the bank tagged Myocardial Oxygen Supply.