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Myocardial Infarction and Ischemia

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Basic Electrocardiography

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Abstract

Heart attacks and myocardial ischemia can be diagnosed by electrocardiogram (EKG). Some of the changes are typical, others are more subtle, and none of the changes are completely sensitive or specific. Additionally, myocardial infarctions demonstrate typical changes over time, or “evolve” in characteristic ways.

Myocardial ischemia frequently presents with ST segment depression. Rarely, myocardial ischemia can present with T wave inversion or ST segment elevation. The key feature in diagnosing myocardial ischemia on the EKG is the demonstration that the ST segment depression, T wave inversion, or ST elevation is reversible in minutes, with or without medical intervention.

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Authors and Affiliations

  1. Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA

    Brent G. Petty M.D.

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  1. Brent G. Petty M.D.
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Petty, B.G. (2016). Myocardial Infarction and Ischemia. In: Basic Electrocardiography. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-2413-4_3

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  • DOI: https://doi.org/10.1007/978-1-4939-2413-4_3

  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4939-2412-7

  • Online ISBN: 978-1-4939-2413-4

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