There is a major difference between the heart of a developing fetus and that of a fully mature adult: a fetus will have a hole in the right atrium. This allows blood to flow straight through to ...

Tricuspid regurgitation develops when the tricuspid valve between the right atrium and right ventricle does not close properly. The tricuspid valve controls the blood flow from the right atrium to ...

Tricuspid atresia means that blood cannot flow from the right atrium to the right ventricle. Tricuspid regurgitation means that this valve cannot fully close, while tricuspid stenosis causes the ...

It opens due to a build-up of pressure in the right atrium, and prevents back flow of blood from the right ventricle to the right atrium. The bicuspid valve separates the left atrium and left ...

Two different types of frog have the key to channeling and stopping blood flow to different areas of the body. It may change medicine as we know it. Tumors are seen as an invading enemy in the ...