What Is Mitral Valve Regurgitation? When your heart pumps blood, it’s supposed to follow a specific path in one direction. But sometimes, it goes the wrong way. Mitral valve regurgitation is when your ...

The four valves of the heart allow blood to flow through the heart in the right direction. The valves open or close each time the heart beats. Problems with the heart valves can lead to palpitations, ...

What Is Aortic Valve Stenosis? Aortic valve stenosis is a blockage in one of the valves that help control the flow of blood to and from your heart. This stenosis, or narrowing, of the valve can keep ...

PHILADELPHIA (WPVI) -- Heart valves play an important role in the circulation of blood throughout the body. They open and close to control or regulate the blood flowing into and out of the heart.

In a healthy heart, blood flows in only one direction. The four valves of the heart prevent blood from flowing backward. But a leaky heart valve, or heart valve regurgitation, causes a backflow of ...

Similar to testing a car, a team of researchers at UBC Okanagan has been test-driving a number of mechanical heart valves (MHV)—and the one designed in their own lab appears to outperform the others.

The initial implementation of the method was performed in sheep, where the scientists likened their approach to "a cotton-candy machine with a hair dryer behind it." Although further long-term in vivo ...

Doctors may one day be able to use stem cells taken from umbilical cord blood to build new heart valves for babies born with heart defects, say researchers. 'In our concept, if prenatal testing shows ...