Correlates of non-target vessel-related adverse events in patients with ST-segment elevation myocardial infarction: insights from five-year follow-up of the EXAMINATION trial.

AIMS: The aim of this substudy was to determine the five-year correlates of non-TV-related adverse events (AE) in STEMI patients included in the EXAMINATION trial.

METHODS AND RESULTS: The EXAMINATION trial randomised 1,498 STEMI patients to bare metal or everolimus-eluting stent implantation. In this substudy, patients were analysed according to non-TV-related AE, defined as the composite of either non-TV revascularisation (non-TVR) or non-TV-related myocardial infarction (MI). At five-year follow-up, 125 patients (8.3%) exhibited 136 non-TV-related AE (124 [8.3%] non-TVR, 12 [0.8%] non-TV-related MI), accounting for 47.1% of 289 non-fatal cardiac events overall. These patients had a higher incidence of diabetes mellitus (p<0.001), arterial hypertension (p=0.032), previous MI (p=0.073), multivessel disease (p<0.001), and incomplete revascularisation (p=0.049), and a lower rate of ST-segment resolution >70% (p=0.042) as compared to the rest. At Cox analysis, previous MI (HR 1.872, 95% CI: 1.004-3.489; p=0.048), incomplete revascularisation (HR 1.746, 95% CI: 1.029-2.963; p=0.039) and diabetes (HR 1.942, 95% CI: 1.292-2.919; p=0.001) were independent correlates of non-TV-related AE.

CONCLUSIONS: In STEMI patients undergoing primary percutaneous coronary intervention, previous MI, incomplete revascularisation and diabetes resulted in being independent correlates of five-year non-TV-related AE.