EKG in left atrial enlargement
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| EKG in left atrial enlargement Classification and external resources | ||
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| eMedicine | med/ | |
| MeSH | [1] | |
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Overview
Left atrial enlargement may be observed among patients with pressure or volume overload of the left atrium. See the differential diagnosis below for a list of associated conditions.
Differential Diagnosis of Left Atrial Enlargement
- Atrial aneurysm
- Infective endocarditis
- Left heart failure
- Mitral regurgitation
- Mitral stenosis
- Mitral valve prolapse
- Myxedema
- Patent Ductus Arteriosus
- Ventricular septal defect
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
 Left atrial enlargement |
12 lead EKG: Left atrial enlargement |
 Left atrial enlargement as seen in lead V1. |
 Left atrial enlargement, a 12 lead ECG |
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
Images shown below are courtesy of RadsWiki and copylefted.
 Double density sign |
 Same patient & the same image. Double density sign. Image's modified for more contrast and better visualization. |
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
