What kind of MI is indicated by ST elevations in leads V1, V2, V3, V4, and V5?

The presence of ST elevations in leads V1, V2, V3, V4, and V5 indicates an anteroseptal myocardial infarction (MI). These leads correspond to the anterior aspect of the heart and primarily reflect the perfusion zone of the left anterior descending coronary artery (LAD).

In the context of an anteroseptal MI, the ST elevations in the specified leads demonstrate that the ischemic process affects not only the anterior wall but also the septum that separates the left and right ventricles. This pattern is critical as it provides clinicians with localized information about the area of myocardial ischemia, which is essential for appropriate management and intervention.

Other types of MIs affect different regions of the heart and have distinct EKG patterns. For example, an inferior wall MI typically presents with ST elevations in leads II, III, and aVF; lateral wall MI would show ST elevations in leads I, aVL, and V5-V6; and a posterior wall MI often demonstrates ST depressions in the anterior leads, with reciprocal ST elevations seen in the posterior leads. Recognizing these patterns allows for an accurate diagnosis and guides treatment options for the patient.