A 56-year-old man presented to the emergency department with severe sudden onset chest pain and dyspnea. The patient has a history of hypertension and dyslipidemia. An ECG showed ST elevation. Cardiac enzymes were elevated. The patient is diagnoased with acute myocardial infarction, and he was referred for urgent cardiac catheterization. The patient is right-dominant circulation. The stenotic portion of the artery was localized before the origin of the artery supplying the atrioventricular node. Which of the following arteries is most likely affected?

Question

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Eductional Objective: Coronary dominance is determined by the coronary artery that supplies the posterior descending artery. The dominant artery gives rise to the AV nodal . Right-dominant circulation is the most common, where the PDA originates from the right coronary artery.

A 56-Year-Old Man Presented to the Emergency Department with Severe