What EKG leads represent an anterior wall/septal infarction?

The leads that represent an anterior wall or septal infarction are indeed V1 through V4. This area of the heart is supplied by the left anterior descending artery, and these leads correspond to the anterior surface and the interventricular septum.

Leads V1 and V2 primarily monitor the septum, while V3 and V4 reflect the anterior wall of the left ventricle. When there is a blockage or reduction of blood flow in the left anterior descending artery, the resulting injury to this region can be seen on the EKG in these leads, typically producing characteristic changes such as ST elevation or Q waves depending on the timing and severity of the infarction.

Identifying an anterior wall or septal infarction using these leads is crucial in emergency settings as it aids in rapid diagnosis and treatment, improving patient outcomes.