Prevalence of the coronary artery anomaly is approximately 1% of the population who undergo coronary angiography. The anomalous origin of the right coronary artery (RCA) as a branch of the left anterior descending artery (LAD) is a very rare variation of single coronary artery. The anatomic variation has no clinical significance. However, some patterns of congenital coronary artery anomalies can cause clinical manifestations of myocardial ischemia, reducing myocardial perfusion. We report on a case of a 78-year-old man who had anomalous RCA arising from the proximal part of the LAD, which probably caused chest pain.

Introduction
 Case report
 Discussion
 References

• One Zoong Kim(Division of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center)
• Sang Woo Cho(Division of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center)
• Dong Min Lim(Division of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center)
• Soung Ha Cho(Division of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center)
• Su Kyoung An(Division of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center)
• Woong Sun Yoo(Division of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center)
• Hoon Ki Park(Division of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center)
• Jong Seon Park(Division of Cardiology, Department of Internal Medicine, Veterans Health Service Medical Center) Corresponding author