Ebstein's anomaly
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| ICD-10 | Q22.5 | |
|---|---|---|
| ICD-9 | 746.2 | |
| OMIM | 224700 | |
| DiseasesDB | 4039 | |
| eMedicine | med/627 | |
| MeSH | C14.240.400.395 | |
Ebstein's anomaly is a congenital heart defect in which the opening of the tricuspid valve is displaced towards the apex of the right ventricle of the heart.
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[edit] Presentation
The annulus of the valve is still in normal position. The valve leaflets, however, are to a varying degree, attached to the walls and septum of the right ventricle. There is subsequent atrialization of a portion of the morphologic right ventricle (which is then contiguous with the right atrium). This causes the right atrium to be large and the anatomic right ventricle to be small in size.
[edit] Risk factors
There appears to be an increased risk of this abnormality in infants of women taking Lithium during the first trimester of pregnancy.
[edit] History
Ebstein's anomaly was named after Wilhelm Ebstein.
[edit] Related abnormalities
While Ebstein's anomaly is defined as the congenital displacement of the tricuspid valve towards the apex of the right ventricle, it is often associated with other abnormalities.
[edit] Anatomic abnormalities
Typically, there are anatomic abnormalities of the tricuspid valve, with enlargement of the anterior leaflet of the valve.
About 50% of individuals with Ebstein's anomaly have an associated shunt between the right and left atriums, either an atrial septal defect or a patent foramen ovale.
[edit] Electrophysiologic abnormalities
About 50% of individuals with Ebstein's anomaly have evidence of Wolff-Parkinson-White syndrome, secondary to the atrialized right ventricular tissue.
[edit] External links
- Ebstein's Malformation information from Seattle Children's Hospital Heart Center
- Diagram at kumc.edu
- Overview and diagram at mayoclinic.org
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