Definition and Prediction of Periprocedural Myocardial Infarction in Elective Percutaneous Coronary Intervention: The ALPHEUS-MI Study.
Michel Zeitouni, Gilles Montalescot, Vincent Roule et al.
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In 30 seconds
The ALPHEUS-MI study was a prespecified analysis within a multicentre randomised trial, examining periprocedural myocardial infarction (MI) and injury in 1,883 patients with chronic coronary syndrome undergoing elective PCI. Event rates varied substantially by definition: the trial’s primary and secondary endpoints occurred in 35.9% and 77.2%, while ARC-2/SCAI periprocedural MI occurred in 2.0%. Rates rose with accumulating patient, lesion, and procedural risk features. Across four definitions, implanted stent length greater than 60 mm was the only common correlate, with adjusted odds ratios ranging from 2.2 to 6.0.
Key findings
- The ALPHEUS primary endpoint occurred in 35.9% and its main secondary endpoint in 77.2% of patients.
- ARC-2/SCAI periprocedural MI occurred in 2.0%; ARC-2 significant myocardial injury occurred in 3.2%.
- Event rates increased as high-risk patient, lesion, and procedural features accumulated.
- Stent length greater than 60 mm was the only common correlate across definitions (adjusted odds ratios 2.2 to 6.0).
Why it matters
Periprocedural MI and myocardial injury rates depend strongly on the definition used, which is important when interpreting PCI outcomes and comparing studies. The association between longer stent length and events also highlights the relevance of coronary disease extent and procedural complexity when assessing risk, while the findings do not establish that stent length itself causes these events.
What to keep in mind
This was an analysis within a trial population, and the reported associations do not establish causation. Event rates differed substantially across endpoint definitions.