• Ole Fröbert, Matthias Götberg, Oskar Angerås, Lena Jonasson, David Erlinge, Thomas Engstrøm, Jonas Persson, Svend E Jensen, Elmir Omerovic, Stefan K James, Bo Lagerqvist, Johan Nilsson, Amra Kåregren, Rasmus Moer, Cao Yang, David B Agus, Andrejs Erglis, Lisette O Jensen, Lars Jakobsen, Evald H Christiansen, and John Pernow.
• Örebro University, Faculty of Health, Department of Cardiology, Örebro, Sweden. Electronic address: ole.frobert@regionorebrolan.se.
• Am. Heart J. 2017 Jul 1; 189: 94-102.

BackgroundRegistry studies and case-control studies have demonstrated that the risk of acute myocardial infarction (AMI) is increased following influenza infection. Small randomized trials, underpowered for clinical end points, indicate that future cardiovascular events can be reduced following influenza vaccination in patients with established cardiovascular disease. Influenza vaccination is recommended by international guidelines for patients with cardiovascular disease, but uptake is varying and vaccination is rarely prioritized during hospitalization for AMI.Methods/DesignThe Influenza vaccination After Myocardial Infarction (IAMI) trial is a double-blind, multicenter, prospective, registry-based, randomized, placebo-controlled, clinical trial. A total of 4,400 patients with ST-segment elevation myocardial infarction (STEMI) or non-STEMI undergoing coronary angiography will randomly be assigned either to in-hospital influenza vaccination or to placebo. Baseline information is collected from national heart disease registries, and follow-up will be performed using both registries and a structured telephone interview. The primary end point is a composite of time to all-cause death, a new AMI, or stent thrombosis at 1 year.ImplicationsThe IAMI trial is the largest randomized trial to date to evaluate the effect of in-hospital influenza vaccination on death and cardiovascular outcomes in patients with STEMI or non-STEMI. The trial is expected to provide highly relevant clinical data on the efficacy of influenza vaccine as secondary prevention after AMI.Copyright © 2017 The Author(s). Published by Elsevier Inc. All rights reserved.

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