What are the characteristics of stage 1 ECG findings in the diagnosis of acute pericarditis?

Updated: Apr 02, 2019
  • Author: Sean Spangler, MD; Chief Editor: Terrence X O'Brien, MD, MS, FACC  more...
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Answer

Stage 1 accompanies the onset of acute pain and is the hallmark of acute pericarditis. ECG changes include diffuse concave upward ST elevation, except in leads aVR and V1 (usually depressed). T waves are upright in the leads with ST elevation, and the PR segment deviates opposite to P-wave polarity. See the image below.

Stage 1 electrocardiograph changes in a patient wi Stage 1 electrocardiograph changes in a patient with acute pericarditis.

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