title: Dual left anterior descending coronary artery: CT findings.
abstract: OBJECTIVE
  Dual left anterior descending coronary artery (LAD) is a rare congenital anomaly with four subtypes. This anomaly has been described in the angiographic literature, but with the increasing use of coronary CT, it becomes imperative for CT interpreters to be aware of this entity, its implications, and the cross-sectional findings. We report the ECG-gated 64-MDCT coronary angiographic findings on two types of dual LAD (types 1 and 4). The imaging findings of the other types of dual LAD also are discussed.
  
  
  CONCLUSIONS
  It is important for CT interpreters to be aware of and recognize dual LAD at coronary CT. Because of inability to visualize the additional vessel, especially when the long LAD originates from the right coronary sinus, the variant anatomic features can be misinterpreted at routine coronary angiography for mid-LAD occlusion. Identification of an additional LAD can be important for diagnosis and therapeutic planning.
authors.affiliation: Department of Radiology, Division of Cardiothoracic Radiology, University of Michigan Health Service, 1500 E Medical Center Dr., Ann Arbor, MI 48109, USA. prachia@med.umich.edu
authors.forename: Prachi P
authors.initials: PP
authors.lastname: Agarwal
authors.forename: Ella A
authors.initials: EA
authors.lastname: Kazerooni
mesh_terms: D000328:Adult; D017023:Coronary Angiography / Q000379:methods*; D003330:Coronary Vessel Anomalies / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed