Cardiac Medicine Certification Practice Exam 2026 – Comprehensive Prep Guide

ST elevation in leads V3-V4 is indicative of an anteroseptal myocardial infarction. This specific lead placement reflects changes in the anterior and septal walls of the left ventricle, which are primarily supplied by the left anterior descending artery.

In the case of anteroseptal myocardial infarction, the ST segment elevation observed in these leads suggests that there is significant damage or ischemia occurring in these regions of the heart muscle. It typically involves the septal area between the left and right ventricles and can often manifest in conjunction with elevations in leads V1 and V2, providing further confirmation of the anterior wall’s involvement as well.

Identifying the type of myocardial infarction based on the specific leads that show ST elevation is critical for effective diagnosis and management. Knowing that V3-V4 elevations specifically correlate with anteroseptal injury allows for timely interventions that can possibly restore blood flow to the affected areas and minimize heart muscle damage.