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]

## Overview[edit | edit source]

An EKG is a standard method of evaluating a patient with cardiomegaly. It can help to determine the cause, severity, and the specific chamber which is affected. A q wave would indicate an area of muscle death accounting for the enlargement, and ST elevation may suggest a myocardial infarction, myocarditis or pericarditis.

## Electrocardiogram[edit | edit source]

* 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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## References[edit | edit source]

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