Cardiomegaly electrocardiogram

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor in Chief: Cafer Zorkun, M.D., Ph.D. [2]

Electrocardiogram

• The presence of q waves suggest a prior MI to account for the enlargement.
• ST segment elevation would suggest either ongoing or resolving ST elevation myocardial infarction or myocarditis or pericarditis.
• The EKG may suggest signs of left atrial enlargement, right atrial enlargement or right axis deviation which may point toward a specific diagnosis.

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• Shown below is an image of an EKG depicting right atrial enlargement.

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• Shown below is an image of an EKG depicting biatrial enlargement.

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