Ten-year experience with off-pump coronary artery bypass grafting: lessons learned from early postoperative angiography.
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.
Kim
Ki-Bong
KB
Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul, Republic of Korea. kimkb@snu.ac.k
Kim
Jun Sung
JS
Kang
Hyun-Jae
HJ
Koo
Bon-Kwon
BK
Kim
Hyo-Soo
HS
Oh
Byung-Hee
BH
Park
Young-Bae
YB
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