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==Overview==
==Overview==

Revision as of 19:07, 15 April 2012

Left atrial enlargement electrocardiogram
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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]

Overview

Left atrial enlargement may be observed among patients with pressure or volume overload of the left atrium.

Differential Diagnosis of Left Atrial Enlargement

EKG in Left Atrial Enlargement

Criteria for left atrial enlargement. Either;
P wave with a broad (>0.04 sec or 1 small square) and deeply negative (>1 mm) terminal part in V1
P wave duration >0.12 sec in leads I and / or II


Chest X-ray in Left Atrial Enlargement

In general;

  • Double density sign: Occur when the right side of the left atrium pushes into the adjacent lung.
  • Convex left atria appendage: usually reflect prior rheumatic heart disease
  • Splaying of the carina
  • Posterior displacement of the left main stem bronchus on lateral radiograph
  • Superior displacement of the left main stem bronchus on frontal view
  • Posterior displacement of a barium filled esophagus

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