A disorder involving backflow of blood from the right ventricle to the right atrium during contraction of the right ventricle. It is caused by damage to the tricuspid heart valve or enlargement of the right ventricle.
Many diseases can affect the tricuspid valve.
The most common of these is rheumatic fever . The valve fails to close properly, and blood can backflow to the right atrium from the right ventricle, and from there back into the veins. This reduces the flow of blood forward into the lungs. The incidence is 4 out of 100,000 people. Discuss any history of heart valve disease or any family history of congenital heart diseases before treatment by a health care provider or dentist.