Morphological and pharmacological determinants of peri-procedural myocardial infarction following elective stent implantation: Optical coherence tomography sub-analysis of the PRASFIT-Elective study

摘要

AbstractBackgroundPrevious studies have suggested that peri-procedural myocardial infarction (PMI) following percutaneous coronary intervention (PCI) is associated with adverse short- and long-term outcomes, and several morphological predictors of PMI have been studied. However, the determinants of PMI under novel anti-platelet therapy are not fully elucidated.Methods and resultsPRASFIT-Elective is a multicenter, parallel-group study of PCI patients in non-acute settings receiving either prasugrel or clopidogrel in addition to aspirin. Among 742 study patients, 94 (116 lesions) underwent optical coherence tomography (OCT) to evaluate the area of intra-stent tissue (IST, which comprises tissue protrusion and thrombus) after stenting in addition to standard parameters. We investigated the relationship between the peak creatine kinase (CK)-MB fraction levels after PCI and post-stent OCT findings, as well as on-treatment platelet reactivity determined by the P2Y12reaction units (PRU) at PCI, in a post hoc manner. The multivariate linear analysis revealed that a larger total IST area (standardized coefficient: 0.370,p<0.001) and smaller minimal stent diameter (standardized coefficient: ?0.242,p<0.014), but not the PRU value (p=0.988), were independently associated with CK-MB leakage. The IST area after stenting was mainly determined by the target lesion lipid index (averaged lipid arc×lipid length) (r=0.583,p<0.001).ConclusionFollowing elective PCI, a large IST area originating from a lipid-rich plaque and a smaller minimal stent diameter were associated with PMI.]]>