Right ventricular myocardial infarction (RVMI) occurs in 30% to 50% of patients experiencing ST-elevation myocardial infarction in the inferior wall.1–3  Occlusion of the right coronary artery (RCA) proximal to the marginal branch is most frequently the culprit lesion.1,4–6  The main complications associated with RVMI include ventricular arrhythmia, cardiogenic shock, and atrioventricular blocks (second-degree type II and complete atrioventricular blocks).6–8  These complications are specific to RVMI and independent of left ventricular dysfunction.2,7  In-hospital mortality and morbidity rates are 3 times higher in patients with inferior wall myocardial infarction (IWMI) associated with RVMI than in those with IWMI alone,1,7,9  although the presence of an RVMI does not affect long-term mortality rates.9,10  Early identification of an RVMI on a 12-lead electrocardiogram (ECG) enables clinicians...

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