What is mild tricuspid regurgitation?

This is an often searched term as it is seen on near normal echocardiogram reports.
Tricuspid regurgitation is leak in the valve between right ventricle and right atrium. Right atrium is the upper chamber from which right ventricle, the lower chamber receives blood when it relaxes after a contraction. Tricuspid valve normally prevents backflow of blood into the right atrium when the right ventricle contracts and pumps blood to the lungs for oxygenation.