• Olavi Parkkonen, Jaakko Allonen, Satu Vaara, Matti Viitasalo, Markku S Nieminen, and Juha Sinisalo.
• HUCH Heart and Lung Center, Helsinki University Central Hospital (HUCH), Helsinki, Finland. Electronic address: olavi.parkkonen@helsinki.fi.
• J Electrocardiol. 2014 Sep 1;47(5):692-9.

BackgroundPrevious efforts to distinguish acute anterior ST-elevation myocardial infarction (anterior-STEMI) from various forms of takotsubo cardiomyopathy (TTC) by electrocardiography (ECG) have produced differing results.MethodsWe performed a retrospective comparison of acute ECGs between 48 apical and 9 mid-ventricular TTC patients, with 96 anterior-STEMI patients. ECG was recorded in acute phase (<24h from onset of pain), and analyzed for ST-changes, negative T-waves, abnormal Q-waves and QT-interval duration. Time from onset of pain to ECG was gathered from patient records.ResultsAnterior-STEMI patients had ST-elevation in lead V1 more frequently than apical (70% vs 15%, p<0.0001) or mid-ventricular TTC patients (70% vs 0%, p<0.0001), and higher ST-elevation amplitudes in leads V2-V5 (p<0.02). Lack of ST-elevation in lead V1 and ST-elevation amplitude <2mm in lead V2 distinguished TTC from anterior-STEMI patients with 63% sensitivity and 93% specificity, with 79% predictive value.ConclusionsIn patients with anterior ST-elevation and acute chest pain, lack of ST-elevation in lead V1 and ST-elevation amplitude <2mm in lead V2 suggests a TTC diagnosis. However, this criterion is not reliable enough in clinical practice to distinguish between TTC and anterior-STEMI patients.Copyright © 2014 Elsevier Inc. All rights reserved.

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