• Mikkel Malby Schoos, Henning Kelbæk, Frants Pedersen, Benedict Kjærgaard, Sven Trautner, Lene Holmvang, Erik Jørgensen, Steffen Helqvist, Kari Saunamäki, Thomas Engstrøm, and Peter Clemmensen.
• Department of Cardiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
• Emerg Med J. 2014 Nov 1;31(11):920-5.

BackgroundSince 2005, ST-elevation myocardial infarction (STEMI) patients from the island of Bornholm in the Baltic Sea have been transferred for primary percutaneous coronary intervention (pPCI) by an airborne service. We describe the result of pPCI as part of the Danish national reperfusion strategy offered to a remote island population.MethodsIn this observational study, patients from Bornholm (n=101) were compared with patients from the mainland (Zealand) (n=2495), who were grouped according to time intervals (<120, 121-180, >180 min). The primary endpoint was all-cause 30-day mortality. Individual-level data from the Central Population Registry provided outcome that was linked to our inhospital PCI database.ResultsTreatment delay was longer in patients from Bornholm (349 min (IQR 267-446)) vs Zealand (211 (IQR 150-315)) (p<0.001). In patients from Zealand, 30-day mortality did not increase with time intervals (p=0.176), whereas, long-term mortality did (∼3 years) (p=0.007). Thirty-day mortality was similar for Bornholm and the overall Zealand group (5.9% vs 6.2% p=0.955). Early presenters (<180 min) from Zealand (37%) had similar 30-day (5.3% vs 5.9% p=0.789), but numerically reduced long-term mortality compared with Bornholm (12.8% vs 15.8% p=0.387). Age, female gender, diabetes, Killipclass >2 and preprocedural thrombolysis in myocardial infarction (TIMI) flow 0/1 independently predicted 30-day mortality, however, treatment delay did not. Postprocedural TIMI flow 3 predicted improved survival.ConclusionsIn this small population of STEMI patients from a remote island, airborne transfer appears feasible and safe, and their 30-day mortality after pPCI comparable with that of the mainland population despite inherent reperfusion delay exceeding guidelines.Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

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