Tricuspid Valve Dysplasia is a congenital disease where the tricuspid valve did not form properly in utero.  

This condition allows tricuspid regurgitation (backwards blood flow) which causes a volume overload to the right heart.  

The long-term prognosis is difficult to predict, but often favorable.  Life-long medications and recheck appointments are often necessary.  

Affected patients may eventually progress into right-sided congestive heart failure.  

Clinical signs of right-sided congestive heart failure may include abdominal swelling (ascites) and/or pleural effusion (fluid inside the chest, around the lungs).  

This may make breathing difficult and additional therapy will be required.