Which ECG leads are most likely to show ST elevations in an anterior wall infarction?

Prepare for the Cleveland Clinic EKG Test with flashcards and multiple choice questions. Gain insights with hints and explanations. Ace your exam today!

Multiple Choice

Which ECG leads are most likely to show ST elevations in an anterior wall infarction?

The front (anterior) wall of the left ventricle is viewed most clearly by the chest leads V1 through V4. In an anterior wall infarction, typically due to occlusion of the left anterior descending artery, the damaged myocardium produces a current of injury that is directed toward these anterior leads, resulting in ST-segment elevation there. That’s why V1–V4 are the most likely to show elevations. Leads V5–V6 look at the lateral wall and would more likely show changes if the infarction extended laterally. The high lateral leads I and aVL similarly reflect the lateral wall, not the primary anterior region. While some extensive infarcts can involve adjacent territories, the classic and most characteristic elevation pattern for an anterior wall MI is in V1–V4.

The front (anterior) wall of the left ventricle is viewed most clearly by the chest leads V1 through V4. In an anterior wall infarction, typically due to occlusion of the left anterior descending artery, the damaged myocardium produces a current of injury that is directed toward these anterior leads, resulting in ST-segment elevation there. That’s why V1–V4 are the most likely to show elevations.

Leads V5–V6 look at the lateral wall and would more likely show changes if the infarction extended laterally. The high lateral leads I and aVL similarly reflect the lateral wall, not the primary anterior region. While some extensive infarcts can involve adjacent territories, the classic and most characteristic elevation pattern for an anterior wall MI is in V1–V4.

More practice questions