title: Anatomy of the sinoatrial nodal branch in Korean population: imaging with MDCT.
abstract: OBJECTIVE
  To evaluate, on a retrospective basis, the anatomic characteristics of the arterial supply to the sinoatrial node (SAN) in the Korean population using an ECG-gated multi-detector CT (MDCT).
  
  
  METHODS
  The electrocardiographic-gated MDCTs of 500 patients (258 men and 242 women; age range, 17-83 years; mean age, 58.6 ± 12.04 years) were analyzed retrospectively. In each case, the SAN artery (arteries) was named according to a special nomenclature with regard to origin, course, and termination.
  
  
  RESULTS
  A total of 516 SAN arteries were visualized in 496 patients. The SAN was supplied by a single artery in 476 (96.4%) cases and by 2 arteries in 18 (3.6%) cases. The SAN originated from the right coronary artery in 265 (53.4%) cases and from the left circumflex in 213 (43%) cases.
  
  
  CONCLUSIONS
  This study can provide basic data on variations of the SAN artery in the Korean population.
authors.affiliation: Department of Radiology, Seoul National University College of Medicine, Seoul 110-744, Korea.
authors.forename: Yong Sub
authors.initials: YS
authors.lastname: Song
authors.forename: Whal
authors.initials: W
authors.lastname: Lee
authors.forename: Eun-Ah
authors.initials: EA
authors.lastname: Park
authors.forename: Jin Wook
authors.initials: JW
authors.lastname: Chung
authors.forename: Jae Hyung
authors.initials: JH
authors.lastname: Park
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D055424:Cardiac-Gated Imaging Techniques; D003330:Coronary Vessel Anomalies / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D056910:Republic of Korea; D012189:Retrospective Studies; D012849:Sinoatrial Node / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*