Background: The aim of this retrospective study was; determination of mid-term angiographic results, the rate of disease progression and re-intervention of the 619 patients who had been operated with the techniques of on- pump and off-pump coronary artery bypass grafting (CABG).

Methods: During the period from June 1992 until December 2001, control angiographic examinations were performed in 619 (On-Pump: 509, Off-Pump: 110) patients at an average of 52.3 ± 15.8 months after CABG. A total of 1689 anastomoses on 619 patients were evaluated. Patency rate of the grafts, newly developed vessel lesions, and re-interventions were noted.

Results: Mean age was 55.2 ± 9.3 year in on-pump group and 52.9 ± 10.1 year in off-pump group respectively. The percentage of female patients was 12.9% in the on-pump group and 21.8% in the off-pump group. The mean interval from operation to angiographic examination was 55.4 ± 17.6 months and 49.1 ± 12.8 months respectively. The patency rate of the left internal mammary artery and saphenous vein graft was 93%, 75.4% in the on-pump group and 91%, 66% in the off-pump group. There were a total of 144 clinically significant newly developed lesions in 131 (25.7%) patients and a total of 126 reinterventions in 112 (22%) patients in the on-pump group and 33 clinically significant newly developed lesions in 29 (26.3%) patients and 23 reinterventions in 23 (20.9%) patients in the off-pump group.

Conclusion: We believe our study may give an aspect for overall evaluations of the mid-term outcomes of CABG either on-pump or off-pump fashion. Further complementary studies with higher number of patients in contemporary methods are warranted.

Keywords : CABG, coronary angiography