title: Ten-year experience with off-pump coronary artery bypass grafting: lessons learned from early postoperative angiography.
abstract: OBJECTIVE
  We performed early postoperative angiography to assess anastomosis accuracy and patency after off-pump coronary artery bypass grafting.
  
  
  METHODS
  One thousand three hundred forty-five patients who underwent off-pump coronary artery bypass grafting between January 1998 and December 2007 were studied. Grafts for distal anastomoses were left internal thoracic artery (n=1281), right internal thoracic artery (n=679), right gastroepiploic artery (n=836), radial artery (n=14), and saphenous vein (n=188). Groups underwent off-pump coronary artery bypass grafting without (group I, n=234) or with (group II, n=1111) intraoperative graft flowmetry. Early postoperative (< or = 7 days) angiography was performed in 1278 cases (95.0%) at 1.6+/-1.2 postoperative days.
  
  
  RESULTS
  Operative mortality was 1.6%. Average number of distal anastomoses was 3.0+/-1.0. Postoperative angiography showed early patencies of 98.9% for arterial grafts and 88.2% for venous grafts (P < .001). In group II, intraoperative flowmetry-guided revision was performed in 2.2% of distal anastomoses. Patency of arterial grafts was significantly higher in group II than group I (97.2% vs 99.1%, P < .001); however, patency of venous grafts was not significantly different (86.0% vs 92.2%, P=.099). Early reoperation for graft revision according to angiographic findings was performed in 35 patients.
  
  
  CONCLUSIONS
  Early patency of venous grafts was significantly lower than that of arterial grafts. Intraoperative flowmetry and revision of abnormal grafts improved early graft patency, and reoperation according to early angiographic findings may further improve graft patency.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul, Republic of Korea. kimkb@snu.ac.k
authors.forename: Ki-Bong
authors.initials: KB
authors.lastname: Kim
authors.forename: Jun Sung
authors.initials: JS
authors.lastname: Kim
authors.forename: Hyun-Jae
authors.initials: HJ
authors.lastname: Kang
authors.forename: Bon-Kwon
authors.initials: BK
authors.lastname: Koo
authors.forename: Hyo-Soo
authors.initials: HS
authors.lastname: Kim
authors.forename: Byung-Hee
authors.initials: BH
authors.lastname: Oh
authors.forename: Young-Bae
authors.initials: YB
authors.lastname: Park
mesh_terms: D000368:Aged; D000714:Anastomosis, Surgical; D017023:Coronary Angiography; D047549:Coronary Artery Bypass, Off-Pump; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D012086:Reoperation; D012189:Retrospective Studies; D012212:Rheology; D014654:Vascular Patency