Ebstein's anomaly of the tricuspid valve associated abnormalities: Difference between revisions

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Latest revision as of 17:52, 12 December 2011

Ebsteins anomaly of the tricuspid valve Microchapters

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Differentiating Ebstein's Anomaly from other Diseases

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] and Claudia P. Hochberg, M.D. [2]

Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [3]

Associated 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.

Anatomy

Typically, there are anatomic abnormalities of the tricuspid valve, with enlargement of the anterosuperior leaflet of the valve which is often adherent to the right ventricular free wall.

About 50% of individuals with Ebstein's anomaly have an associated shunt between the right and left atriums, either an atrial septal defect ASD or a patent foramen ovale PFO.

- The tricuspid valve leaflets are displaced toward the RV apex.

- The RV cavity is dilated and the free wall is thin.

- May be associated with LV dysfunction and mitral valve prolapse (MVP).

- It has also been associated with pulmonic stenosis (PS), VSD, pulmonary hypertension, bicuspid aortic valve and right sided aortic arch.

-It is commonly associated with congenitally corrected transposition of the great vessels and occasionally with tetralogy of Fallot.

- Is often associated with one or more accessory conduction pathways in 25%, and WPW in 13%. Usually this is a right sided accessory pathway.

- The presence of an ASD permits right-to-left shunting and cyanosis. The degree of cyanosis is related to the degree of tricuspid regurgitation (TR), tricuspid stenosis (TS) and the compliance of the RV.

References


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