Vol 28, No 6 (2021)
Original Article
Published online: 2021-04-23

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A Prospective, observational, Italian multi-center registry of self-aPposing® cOronary Stents in patients presenting with ST-segment Elevation Myocardial InfarcTION: The iPOSITION registry

Livio Giuliani1, Federico Archilletti2, Giuseppe Andò3, Serena Rossi1, Giorgio Sacchetta4, Giuseppe De Iaco5, Francesco Saporito3, Marco Contarini4, Rosario Parisi6, Sabina Gallina2, Marco Zimarino12, Juan Luis Gutiérrez-Chico7, Nicola Maddestra1
Pubmed: 33942280
Cardiol J 2021;28(6):842-848.


Background: Primary percutaneous coronary intervention (pPCI) in ST-segment elevation myocardial infarction (STEMI) can be challenging for high thrombus burden and catecholamine-induced vasoconstriction. The Xposition-S stent was designed to prevent stent undersizing and minimize strut malapposition. We evaluated 1-year clinical outcomes of a nitinol, self-apposing®, sirolimus-eluting stent, pre-mounted on a novel balloon delivery system, in de novo lesions of patients presenting with STEMI undergoing pPCI.
Methods: The iPOSITION is a prospective, multicenter, post-market, observational study. The primary endpoint, target lesion failure (TLF), was defined as the composite of cardiac death, recurrent target vessel myocardial infarction (TV-MI), and clinically driven target lesion revascularization (TLR).
Results: The study enrolled 247 STEMI patients from 7 Italian centers. Both device and procedural success occurred in 99.2% of patients, without any death, TV-MI, TLR, or stent thrombosis during the hospital stay and at 30-day follow-up. At 1 year, TLF occurred in 2.6%, cardiac death occurred in 1.7%, TV-MI occurred in 0.4%, and TLR in 0.4% of patients. The 1-year stent thrombosis rate was 0.4%.
Conclusions: The use of an X-position S self-apposing® stent is feasible in STEMI pPCI, with excellent post-procedural results and 1-year outcomes.

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