Certified Emergency Nurse Practice Test 2026 – Complete Exam Prep

The leads associated with a left anterior descending (LAD) myocardial infarction are typically V1, V2, V3, and V4. This correlation arises because these leads monitor the anterior wall of the left ventricle, an area that is predominantly supplied by the left anterior descending artery.

In an LAD myocardial infarction, damage occurs to the anterior part of the heart, resulting in characteristic changes in these leads on the electrocardiogram. V1 and V2 provide information from the septal and anterior regions, while V3 and V4 extend into the anterior wall, allowing for a comprehensive view of the area affected by the obstruction.

The other choices represent leads that correspond to different regions of the heart. II, III, and aVF are primarily indicative of inferior wall ischemia, while I, aVL, V5, and V6 are associated with lateral wall infarctions. V3, V4, V5, and V6 include anterior and lateral leads, but do not encompass the full extent of the LAD territory as effectively as V1 through V4, which cover the anterior region specifically connected to the left anterior descending artery.