title: Equivalency of Saphenous Vein and Arterial Composite Grafts: 5-Year Angiography and Midterm Clinical Follow-Up.
abstract: BACKGROUND
  We compared 5-year graft patency rates and midterm clinical outcomes of saphenous vein (SV) composite grafts with those of total arterial (TA) composite grafts in patients who underwent off-pump coronary artery bypass graft surgery (OPCAB).
  
  
  METHODS
  Three hundred sixty-three patients who underwent OPCAB using composite grafts based on the left internal thoracic artery were studied. The SV was used as a second (connected to the left internal thoracic artery) or a third (connected to the second arterial graft) composite graft in 90 patients (SV group); TA composite grafting was performed in 273 patients (TA group). Follow-up was complete in 96.4% of patients (350 of 363), with a median follow-up of 82 months. Five-year graft patency rates and long-term clinical outcomes were compared. A propensity score-matched analysis was also performed to minimize differences in preoperative and intraoperative variables (n = 69 in each group).
  
  
  RESULTS
  There were no differences in operative mortality and postoperative complications between the SV group and TA group. Actuarial 5-year patency rates of the venous and arterial composite grafts were 89.3% and 89.5%, respectively (p = 0.958). Those were also similar between the two propensity score-matched SV and TA groups (90.5% and 89.3%, respectively; p = 0.759). Five-year overall survival and freedom from major adverse cardiac and cerebrovascular events were 88.5% and 85.6%, respectively. Those were similar between the two groups before and after propensity score matching.
  
  
  CONCLUSIONS
  The SV composite grafts were equivalent to arterial composite grafts in terms of 5-year graft patency rates and midterm clinical outcomes.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul, Korea.
authors.forename: Ho Young
authors.initials: HY
authors.lastname: Hwang
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Kangwon National University Hospital, Chuncheon-si, Gangwon-do, Korea.
authors.forename: Kyung-Hak
authors.initials: KH
authors.lastname: Lee
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Sejong General Hospital, Bucheon-si, Gyeonggi-do, Korea.
authors.forename: Jung Wook
authors.initials: JW
authors.lastname: Han
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul, Korea. Electronic address: kimkb@snu.ac.kr.
authors.forename: Ki-Bong
authors.initials: KB
authors.lastname: Kim
mesh_terms: D001807:Blood Vessel Prosthesis; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D003331:Coronary Vessels / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007387:Internal Mammary-Coronary Artery Anastomosis / Q000379:methods*; D008297:Male; D008323:Mammary Arteries / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000637:transplantation*; D061330:Multidetector Computed Tomography; D011474:Prosthesis Design; D012189:Retrospective Studies; D012501:Saphenous Vein / Q000637:transplantation*; D013997:Time Factors; D016896:Treatment Outcome; D014654:Vascular Patency / Q000502:physiology*