title: Coronary ostium-straight tube or funnel-shaped? A computerized tomographic coronary angiography study.
abstract: BACKGROUND
  The 3D configuration of the aortic-coronary junction is decisive in stenting ostial coronary lesions. We hypothesized that it varies between straight to funnel-shaped tubes and studied arterial orifices using computerized tomographic coronary angiography (CTCA).
  
  
  RESULTS
  Axial and sagittal 2-D and volumetric 3-D reconstructions of the aorto-coronary junction were performed in 25 patients who underwent CTCA. The following measurements of the left main (LM) and right coronary (RCA) arteries ostia were obtained: the coronary orifice broad base diameter, the diameter of the coronary vessel most proximal segment, the distance between them, and the angles of the aortic-coronary junction. All patients exhibited a funnel-shaped aortic-coronary junction in at least one plane, and none had an entirely straight tube shape. The RCA take-off had symmetric angling in both the axial and sagittal planes in only one patient, while the LM did not have a symmetric origin in either plane in any patient. The mean coronary orificial funnel depth and ostial cross-sectional diameters were measured.
  
  
  CONCLUSIONS
  The frequency of funnel-shaped and asymmetry of the aortic-coronary junction configuration needs to be considered in designing stents for aortic-ostial coronary lesions in order to achieve optimal results and reduce restenosis.
authors.affiliation: Department of Radiology, Tel-Aviv Sourasky Medical Center, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Isreal. aviramgalit@hotmail.com
authors.forename: Galit
authors.initials: G
authors.lastname: Aviram
authors.forename: Haim
authors.initials: H
authors.lastname: Shmilovich
authors.forename: Ariel
authors.initials: A
authors.lastname: Finkelstein
authors.forename: Galia
authors.initials: G
authors.lastname: Rosen
authors.forename: Shmuel
authors.initials: S
authors.lastname: Banai
authors.forename: Moshe
authors.initials: M
authors.lastname: Graif
authors.forename: Gad
authors.initials: G
authors.lastname: Keren
mesh_terms: D000328:Adult; D017023:Coronary Angiography; D003331:Coronary Vessels / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D015607:Stents; D014057:Tomography, X-Ray Computed