Abstract 2524: Long-Term (4 year) Outcome following Drug Eluting Stent Implantation versus Coronary Artery By-pass Surgery in Unprotected Left Main Coronary artery Lesions
One-year outcome following drug-eluting stent (DES) implantation versus coronary artery by-pass grafting (CABG) in unprotected LMCA lesions have been previously reported from our center.
Methods and results Two hundred forty-nine consecutive patients with an unprotected LMCA stenosis electively treated (107 with PCI and DES implantation and 142 with CABG) in our Center, between March 2002 and July 2004, were analysed. Hierarchical study end points were occurrence at 4 years of: death; death and/or myocardial infarction (MI); death, MI and/or stroke; target vessel revascularization (TVR, defined as any revascularization in left coronary system); and major cardiac cerebrovascular events (MACCE). A propensity analysis was performed to adjust for baseline differences between the two cohorts. At 4 year-clinical follow-up, no difference was found between PCI and CABG in the occurrence of death (respectively 12.0% vs. 14.1%; unadjusted odds ratio- OR=0.845; 95% confidence interval-CI=0.365 to 1.890; P=0.80; adjusted OR=0.652; 95% CI=0.254 to 1.620; P=0.42). At adjusted analysis, PCI group showed a trend toward a lower occurrence of the composite endpoint of death and myocardial infarction (13.0% vs. 19.7%; adjusted OR=0.461; 95% CI=0.180 to 1.088; P=0.08). PCI was associated with a lower rate of the composite endpoint of death, MI and/or stroke (respectively 14.0% vs. 22.5%; unadjusted OR=0.519; 95% CI=0.238to 1.071; P=0.07; adjusted OR=0.431; 95% CI=0.175 to 0.971; P=0.04). Indeed, CABG was correlated to lower TVR (8.4% vs. 28% ; unadjusted OR= 5.018; 95% CI= 1.990-23.8; p=0.0001; adjusted OR= 5.928; 95% CI= 1.933 – 38.0; p= 0.0003). No difference was detected in the occurrence of MACCE ( in PCI 36.4% vs. 28.1% in CABG, unadjusted OR=1.409; 95% CI=0.798 to 2.509 P=0.259; adjusted OR=1.438; 95% CI=0.754 to 2.766; P=0.3007).
Conclusions At 4 year-clinical follow-up, in this single-center experience, there was still no difference in the occurrence of MACCE between elective PCI with DES implantation and CABG in LMCA lesions. There was an advantage of PCI in the composite endpoint of death, MI and/or stroke, while a benefit in the need for reintervention was still found in CABG. :