Certified Cardiographic Technician (CCT) Practice Exam 2025 – Your All-in-One Guide to Exam Success!

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During a lateral wall myocardial infarction, which coronary artery is typically occluded?

Circumflex

During a lateral wall myocardial infarction, the circumflex coronary artery is typically occluded. The lateral wall of the left ventricle, which includes the left atrium and part of the interventricular septum, receives its blood supply primarily from the circumflex artery, a branch of the left coronary artery. When this artery becomes blocked, it can lead to ischemia and damage in the areas it supplies, resulting in a lateral wall myocardial infarction.

Understanding the specific functions and territories supplied by each coronary artery is crucial in cardiology. The left anterior descending artery primarily supplies the anterior wall of the left ventricle and the interventricular septum, while the right coronary artery primarily supplies the right ventricle and, in some individuals, the inferior portion of the heart. The aorta itself is not an artery that becomes occluded in this context, as it is the main artery from which the coronary arteries branch off.

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Left anterior descending

Right

Aorta

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