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JOURNAL ARTICLE
MULTICENTER STUDY
Long-Term Outcomes After Stent Implantation for Left Main Coronary Artery (from the Multicenter Assessing Optimal Percutaneous Coronary Intervention for Left Main Coronary Artery Stenting Registry).
American Journal of Cardiology 2017 Februrary 2
We assessed long-term outcomes after left main coronary artery (LMCA) stenting based on lesion types and stenting strategies. In the Assessing Optimal percutaneous coronary Intervention for Left Main Coronary Artery stenting registry, we evaluated 1,607 consecutive patients undergoing stent implantation for unprotected LMCA lesions (bifurcation lesions: n = 1318 and nonbifurcation lesions: n = 289). Among the bifurcation lesions, 1,281 lesions were treated with stenting across the bifurcation (bifurcation 1-stent strategy: n = 999 or bifurcation 2-stent strategy: n = 282). Among the nonbifurcation lesions, 219 lesions were treated with nonbifurcation stenting. The median follow-up duration was 4.6 (95% CI 4.5 to 4.8) years. The 5-year risk of bifurcation lesions relative to nonbifurcation lesions was neutral for target lesion revascularization (TLR) (adjusted hazard ratio [HR] 0.82, 95% CI 0.55 to 1.23, p = 0.34) and all-cause death (adjusted HR 1.22, 95% CI 0.87 to 1.71, p = 0.26). The risk of the bifurcation 1-stent strategy relative to nonbifurcation stenting in nonbifurcation lesions was also neutral for TLR (adjusted HR 1.19, 95% CI 0.74 to 1.90, p = 0.47) and all-cause death (adjusted HR 0.81, 95% CI 0.56 to 1.18, p = 0.27). However, the bifurcation 2-stent strategy was associated with worse clinical outcomes than the bifurcation 1-stent strategy in TLR (adjusted HR 1.76, 95% CI 1.23 to 2.52, p = 0.002) and definite or probable stent thrombosis (crude HR 3.50, 95% CI 1.32 to 9.33, p = 0.01), despite neutral risk for all-cause death (adjusted HR 1.00, 95% CI 0.74 to 1.36, p = 0.99). There was no definite or probable very late stent thrombosis up to 5 years. In conclusion, long-term outcomes after stent implantation for unprotected LMCA lesions were not dependent on the bifurcation lesion types but related to the bifurcation stenting strategies with worse outcomes for the bifurcation 2-stent strategy.
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