Right atrial enlargement: Difference between revisions

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Right atrial enlargement is defined as either:
Right atrial enlargement is defined as either:


* A [[P wave]] >2.5 mm in leads II, III and aVF  
* A [[P wave]] >2.5 mm in leads II, III and aVF (also known as P pulmonale)
* A [[P wave]] >1.5 mm in lead V1
* A [[P wave]] >1.5 mm in lead V1


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[[Image:RAE.png|Right atrial enlargement|center|500px]]
[[Image:RAE.png|Right atrial enlargement|center|500px]]
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==Chest X-Ray==
==Chest X-Ray==
Shown below is the chest x-ray of a patient with [[Ebstein's anomaly]] in whom the right atrium is markedly enlarged as demonstrated by the convex curvature to the right border the heart.
Shown below is the chest x-ray of a patient with [[Ebstein's anomaly]] in whom the right atrium is markedly enlarged as demonstrated by the convex curvature to the right border the heart.

Revision as of 15:25, 29 August 2014

Right atrial enlargement
MeSH [1]

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [2]; Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [3]

Synonyms and keywords: RAE, Himalayan P waves, Himalayan P-wave, giant P waves, right atrial abnormality

Overview

Right atrial enlargement can result from increased pressure in the pulmonary artery. A P wave >2.5 mm in leads II, III and aVF or a P wave >1.5 mm in lead V1 indicates right atrial enlargement. Despite the increase in the height of the P wave, the width of the P wave does not change. Sometimes these large P waves can be referred to as Himalayan P waves.

Causes of Right Atrial Enlargement

In alphabetical order:

The EKG in Right Atrial Enlargement

Right atrial enlargement is defined as either:

  • A P wave >2.5 mm in leads II, III and aVF (also known as P pulmonale)
  • A P wave >1.5 mm in lead V1

Shown below is an illustration of right atrial enlargement:



Shown below is an EKG demonstrating large P waves in leads to 2,3, and aVF which have a P-wave height greater than 2.5 mm consistent with right each one enlargement:

Right atrial enlargement
Right atrial enlargement

Chest X-Ray

Shown below is the chest x-ray of a patient with Ebstein's anomaly in whom the right atrium is markedly enlarged as demonstrated by the convex curvature to the right border the heart.


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