Long-term outcomes of percutaneous coronary intervention in patients with prior coronary artery bypass graft - A retrospective experience.

Objective: To evaluate the long-term clinical outcomes of percutaneous coronary intervention (PCI) in patients who had previously undergone coronary artery bypass grafting (CABG).

Method: A total of 219 patients who had a history of CABG and underwent PCI at tertiary care centre were retrospectively enrolled in this study. Clinical endpoints such as major adverse cardiac events (MACE; cardiac death, non-fatal myocardial infarction [MI], and target vessel revascularization), any death, cardiac death, MI, target vessel revascularization (TVR), and target lesion revascularisation (TLR) were reported at long-term follow-up.

Results: About 66.6 % patients were treated on the native vessel, and 24.2 % on grafts vessel. In all, 360 stents [83.3 % drug-eluting stent (DES) and 16.6 % bare metal stent (BMS)] were implanted. Diabetes mellitus (p = 0.03), LVEF<55 % for PCI (p = 0.04), stent type [BMS (p < 0.001) and DES (p < 0.001)] and chronic kidney disease [(CKD) p < 0.01] were appeared to be the significant predictors of mortality. Age at CABG>50 years (p = 0.04), stent type [BMS (p = 0.03) and DES (p < 0.01)] and CKD (p < 0.01) as independent predictors for MACE. Higher event rate was reported in graft-vessel PCI group as compared to native-vessel PCI group: ISR (p < 0.01), TLR (p = 0.01), mortality (p = 0.04), MACE (p < 0.01) and MI (p = 0.05). Mortality (p < 0.001), MACE (p < 0.001) and MI (p < 0.001) were significantly lower in DES vs. BMS groups.

Conclusion: Native-vessel PCI was associated with better clinical outcomes than graft-vessel PCI that also with the use of DES as the first choice in patients with a history of CABG.