Septal leads V1 and V2
ECG leads / veins · V1 V2
Right precordial leads facing the interventricular septum; ST elevation here points to the LAD septal perforators, while ST depression here is the mirror of the posterior wall.
Traced from the start
Detail
- Territory
- Anterior septum (LAD)
- STEMI threshold
- V2 and V3: 2 mm in men over 40, 2.5 mm in men under 40, 1.5 mm in women; 1 mm elsewhere
When it goes wrong
ST elevation in V1 and V2 with new right bundle branch block
Proximal LAD occlusion involving the septum; watch for complete heart block
ST depression in V1 to V3 with tall R waves
Posterior MI, not anterior ischaemia; record V7 to V9
Practise this structure
1 question in the bank tagged Coronary Circulation.