Replacement of the Pulmonary Valve

[BraveHeart]

The pulmonary valve is a one-way valve that controls the flow of deoxygenated blood from the heart to the lungs. A child born with a defective pulmonary valve may not need immediate treatment if the problem is minor. But in serious cases, the defective valve interferes with the ability of the heart to pump blood into the lungs, eventually weakening the heart muscle...

Heres the link...

http://www.wsoctv.com/health/19270986/detail.html#-