How is the distribution of ECG abnormalities associated with the involved myocardium in myocardial infarction (MI, heart attack)?

Updated: May 07, 2019
  • Author: A Maziar Zafari, MD, PhD, FACC, FAHA; Chief Editor: Eric H Yang, MD  more...
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Answer

Localization of the involved myocardium based on distribution of ECG abnormalities in MI is as follows:

  • Inferior wall - II, III, aVF

  • Lateral wall - I, aVL, V4 through V6

  • Anteroseptal - V1 through V3

  • Anterolateral - V1 through V6

  • Right ventricular - RV4, RV5

  • Posterior wall - R/S ratio greater than 1 in V1 and V2, and T-wave changes in V1, V8, and V9


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