Acute anterior myocardial infarction
See brief interpretation of 12 lead EKG above
- ST segment elevation in lead V1 to V5 (≥ 0.2 mV) plus in lead I and aVL (≥ 0.1 mV)
- pathological Q wave formation (in particular in lead V2)
- reciprocal ST segment depression in lead III and aVF
An extensive acute anterior myocardial infarction is seen on the EKG as ST segment elevation in V1 to V4 (anteroseptal/anterior leads) as well as in V5-V6, aVL and I (lateral leads). ST segment elevation of the lateral leads represent involvement of the lateral portion of the left ventricle.
Also reciprocal changes (ST segment depression) may be seen in inferior leads (aVF, II, III).
An extensive acute anterior myocardial infarction is sometimes referred to as an anteroseptal acute myocardial infarction with lateral extension. The left anterior descending (LAD) coronary artery is involved in anterior wall myocardial infarction.