• American heart journal · Dec 2014

    Incidence, angiographic features and outcomes of patients presenting with subtle ST-elevation myocardial infarction.

    • David Martí, José Luís Mestre, Luisa Salido, María Jesús Esteban, Eduardo Casas, Jaime Pey, Marcelo Sanmartín, Rosana Hernández-Antolín, and José Luís Zamorano.
    • Interventional Cardiology Unit, Department of Cardiology, Ramón y Cajal Hospital, University of Alcalá, Madrid, Spain. Electronic address: docalcala@hotmail.com.
    • Am. Heart J. 2014 Dec 1; 168 (6): 884-90.

    BackgroundBorderline electrocardiograms represent a challenge in ST-segment elevation myocardial infarction (STEMI) management and are associated with inappropriate discharges and delays to intervention.ObjectivesTo assess angiographic characteristics and outcomes of patients presenting with subtle ST-elevation (STE) myocardial infarction.MethodsA total of 504 consecutive patients with suspected STEMI treated by systematic primary percutaneous coronary intervention were prospectively included. Subtle STE was defined as a maximal preinterventional STE of 0.1 to 1 mm. Angiograms were interpreted by investigators unaware of the electrocardiographic data.ResultsThe proportion of patients with subtle STE was 18.3%, 86% of them presented with Thrombolysis In Myocardial Infarction flow grade 0/1 and 91% underwent percutaneous coronary intervention. Despite having smaller infarcts, subtle STE patients associated more frequent multivessel disease (57% vs 44%, P = .02) and larger delays to reperfusion. During a follow-up of 19.0 ± 4.9 months, the rates of death or reinfarction were similar among groups (10.0% vs 12.6%, P = .467). Subtle STE was not associated with better outcomes neither in univariate nor after adjustment in a multivariate analysis (adjusted hazard ratio 0.79, 95% CI 0.37-1.69, P = .546).ConclusionsSubtle STEMI is frequent in clinical practice and is usually associated with acute total coronary occlusion. Therefore, it should be diagnosed and treated in the same expeditiously manner as marked STEMI.Copyright © 2014 Elsevier Inc. All rights reserved.

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