title: Anomalous double right coronary arteries: characteristic multidetector-row computed tomography findings.
abstract: OBJECTIVE
  To evaluate the characteristic multidetector-row computed tomography (MDCT) findings of anomalous double right coronary arteries (RCAs), an extremely rare variant.
  
  
  METHODS
  During a 3-year period, 2569 patients with chest pain underwent MDCT coronary angiography. Five patients (0.2%) with anomalous double RCAs were found (mean age, 66 years; range, 43-81 years; 3 women). The location and number of orifice, anatomical distribution of the RCA and its branches, and presence of atherosclerosis were analyzed.
  
  
  RESULTS
  All the 5 cases of double RCAs originated from the right sinus of Valsalva and could be classified into 3 types according to the characteristics. One patient (type 1) had a double RCA arising from 2 separated orifices in the right sinus of Valsalva; another patient (type 2) had 2 separate RCAs originating from a common orifice in the sinus of Valsalva; the other 3 patients with double RCAs (type 3) had a common main RCA in the sinus of Valsalva with a proximal bifurcation, like the usual left coronary arterial system.
  
  
  CONCLUSIONS
  Our data showed that although a double RCA is a rare anomaly, it is easily detected using MDCT and can be classified into 3 types.
authors.affiliation: Department of Radiology, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea. drysr@unitel.co.kr
authors.forename: Sa Rah
authors.initials: SR
authors.lastname: Yoon
authors.forename: Ah Young
authors.initials: AY
authors.lastname: Jung
authors.forename: Seon Hyeong
authors.initials: SH
authors.lastname: Choi
authors.forename: Oh Young
authors.initials: OY
authors.lastname: Bang
authors.forename: Nam Ho
authors.initials: NH
authors.lastname: Lee
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D050197:Atherosclerosis / Q000000981:diagnostic imaging; D002637:Chest Pain / Q000000981:diagnostic imaging; D003287:Contrast Media; D017023:Coronary Angiography / Q000379:methods*; D003330:Coronary Vessel Anomalies / Q000145:classification / Q000000981:diagnostic imaging* / Q000453:epidemiology; D004562:Electrocardiography; D005260:Female; D006801:Humans; D033162:Incidental Findings; D007472:Iohexol; D008297:Male; D008875:Middle Aged; D011857:Radiographic Image Interpretation, Computer-Assisted; D012850:Sinus of Valsalva / Q000002:abnormalities / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media; D007472:Iohexol