Korean J Med.  2014 May;86(5):618-622.

Acute Myocardial Infarction in a Patient with an Anomalous Origin of the Right Coronary Artery from the Left Anterior Descending Coronary Artery

• Lee DY
• Lee HJ
• Kang SH
• Kim ES
• Lee DH
• Park JS
• Kang EJ

Abstract

A 55-year-old male underwent coronary artery intervention for an acute myocardial infarction of the inferior or lateral wall. The initial left coronary angiogram showed total occlusion of the proximal left circumflex artery (LCX). There was an abnormal coronary artery originating from the mid-portion of the left anterior descending artery (LAD) and running to the right ventricular side. However, we could not identify the anomalous right coronary artery (RCA). We tried to find the RCA in the right coronary cusp to confirm the infarction-related artery, but failed. A focused left coronary angiogram in the posteroanterior projection revealed the entire anatomy of the anomalous RCA. An anomalous origin of the RCA from the LAD is a rare coronary artery anomaly that might affect the physician's decision during coronary intervention. We report an anomalous origin of the RCA from the mid-LAD and discuss the anatomy and clinical significance.

Keyword

Coronary vessel anomalies; Myocardial infarction

MeSH Terms

Arteries
Coronary Vessel Anomalies
Coronary Vessels*
Humans
Male
Middle Aged
Myocardial Infarction*
Running