Often relegated to the status of placeholder in the electrocardiogram, aVR may contain the critical data for the diagnosis of a number of conditions. A review in the American Journal of Emergency Medicine highlights pericarditis, left main coronary obstruction, orthodromic tachycardia and acute tricyclic antidepressant poisoning.
Additional references:
ST elevation in aVR as a sign of left main coronary artery obstruction.
Review of electrocardiographic clues obtainable from aVR (JACC).
Classic paper on the electrocardiographic changes of pericarditis.
The electrocardiogram in non cardiac conditions.
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