title: Change in luminal diameter of the left internal thoracic artery anastomosed to the totally occluded left anterior descending coronary artery.
abstract: BACKGROUND
  Coronary artery bypass grafting (CABG) with a composite Y-graft made of the left internal thoracic artery (LITA) and another arterial graft has a risk for hypoperfusion. Changes over time in the diameter of the LITA anastomosed to the left anterior descending coronary artery (LAD) are not known.
  
  
  METHODS
  Data were collected for 71 patients who had undergone coronary angiography (CAG) immediately and at 1 year following off-pump CABG with a composite Y-graft made of the LITA and either the radial artery or the right gastroepiploic artery. These patients were divided into 2 groups depending on the degree of LAD stenosis. Group 1 (n = 28) consisted of patients with complete occlusion of the LAD. Group 2 (n = 43) consisted of patients with <90% stenosis of the LAD. The clinical state and luminal diameter of the LITA on immediate postoperative and postoperative 1-year CAG were compared and analyzed.
  
  
  RESULTS
  On the immediate postoperative CAG, mean LITA diameter of Group 1 was larger than that of Group 2 (2.09 ± 0.53 vs. 1.61 ± 0.33 mm, P = 0.01). Mean LITA diameter 1 year following CABG was also larger in Group 1 than in Group 2 (2.49 ± 0.31 vs. 2.10 ± 0.45 mm, P = 0.005). Both groups showed significant increases in the LITA diameters at postoperative 1 year.
  
  
  CONCLUSIONS
  The LITA used as a composite Y-graft underwent remodeling, resulting in a larger diameter, to supply adequate myocardial blood. The degree of change in luminal diameter varied according to the severity of the LAD stenosis.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital, Chonnam National University School of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 501-757, South Korea.
authors.forename: Yochun
authors.initials: Y
authors.lastname: Jung
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital, Chonnam National University School of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 501-757, South Korea.
authors.forename: Byoung Hee
authors.initials: BH
authors.lastname: Ahn
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital, Chonnam National University School of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 501-757, South Korea.
authors.forename: Gwan Sic
authors.initials: GS
authors.lastname: Kim
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital, Chonnam National University School of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 501-757, South Korea.
authors.forename: In Seok
authors.initials: IS
authors.lastname: Jeong
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital, Chonnam National University School of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 501-757, South Korea.
authors.forename: Kyo Seon
authors.initials: KS
authors.lastname: Lee
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hwasun Hospital, Chonnam National University School of Medicine, Hwasun, South Korea.
authors.forename: Sang Yun
authors.initials: SY
authors.lastname: Song
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hwasun Hospital, Chonnam National University School of Medicine, Hwasun, South Korea.
authors.forename: Kook Joo
authors.initials: KJ
authors.lastname: Na
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hospital, Chonnam National University School of Medicine, 42 Jebong-ro, Dong-gu, Gwangju, 501-757, South Korea. lovingmylife@naver.com.
authors.forename: Sang Gi
authors.initials: SG
authors.lastname: Oh
mesh_terms: D000368:Aged; D000714:Anastomosis, Surgical; D017023:Coronary Angiography; D047549:Coronary Artery Bypass, Off-Pump / Q000379:methods; D023921:Coronary Stenosis / Q000601:surgery*; D003331:Coronary Vessels / Q000601:surgery*; D005260:Female; D024405:Gastroepiploic Artery / Q000637:transplantation; D006801:Humans; D008297:Male; D008323:Mammary Arteries / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery / Q000637:transplantation*; D008875:Middle Aged; D009929:Organ Size; D017534:Radial Artery / Q000637:transplantation
keywords: Composite graft; Coronary artery bypass grafting; Internal thoracic artery