Why is ECG an effective tool in detecting myocardial ischemia and acute 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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ECG is an effective tool to distinguish between acute MI and the myocardial ischemia that usually precedes it, as not all patients with myocardial ischemia will develop MI.

Transitioning from ischemia to infarction results in precise sequential electrical abnormalities captured on ECG. Moreover, these changes are localized, which helps in detection of the involved region of the myocardium in most cases.

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