Coronary circulation in 12 minutes

Key points

1. LAD: anterior wall and anterior two-thirds of the septum (V1–V4).
2. Left circumflex: lateral wall (I, aVL, V5–V6).
3. Right coronary artery: inferior wall (II, III, aVF) and, in most people, the AV node.
4. About 70–80% of people are right-dominant: the posterior descending artery arises from the RCA.
5. The posteromedial papillary muscle has a single blood supply, so it ruptures more often after inferior MI.

The recorded lesson is in production. The preview plays the key points; the outline is below.

Lesson outline

1. 00:00 Why territories matter
2. 01:40 Left main, LAD and diagonals
3. 04:10 Circumflex and obtuse marginals
4. 06:20 Right coronary artery, SA and AV nodes
5. 08:30 Dominance and the posterior descending artery
6. 10:10 Matching ECG leads to arteries