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Tricuspid atresia - Overview

Alternative Names

Tri atresia

Definition of Tricuspid atresia:

Tricuspid atresia is a type of congenital heart disease in which the tricuspid heart valve is missing or abnormally developed. The defect blocks blood flow from the right atrium to the right ventricle.

Causes, incidence, and risk factors:

Tricuspid atresia is an uncommon form of congenital heart disease that affects about 5 in every 100,000 live births. Twenty percent of patients with this condition will also have have other heart problems.

Normally, blood flows into the right atrium, then through the tricuspid valve to the right ventricle and on to the lungs. If the tricuspid valve is missing or broken, the blood cannot flow from the right atrium to the left ventricle. Blood ultimately cannot enter the lungs, where it must go to pick up oxygen (become oxygenated).

Infants with tricuspid atresia generally are cyanotic (bluish discoloration of skin) and easily become short of breath.

Heart, section through the middle

Tricuspid atresia

Reviewed last on: 12/10/2007
David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.; and Mark A Fogel, MD, FACC, FAAP, Associate Professor of Pediatrics and Radiology, Director of Cardiac MR, The Children's Hospital of Philadelphia.

References

Zipes DP, Libby P, Bonow RO, Braunwald E, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine, 8th ed. St. Louis, Mo; WB Saunders; 2007.

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