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 ...

Surgery is usually the best fix for a severe heart valve disease. Different types of heart valve blockages can happen, and surgery is necessary to fix these problems. Your heart is split into four ...

The heart valves play a vital role in ensuring blood flows correctly through the heart and the rest of the body. If they do not function correctly, a person may require surgery to replace the damaged ...

Heart valve disease occurs when at least one of the four valves in the heart fails to operate as usual. This can be due to valves allowing blood to leak backward, valves being too narrow, or valves ...

In hydronic heating, to control where heated water goes to various sections of a building, the system might rely on two or more zone valves. A zone valve opens or closes based on demand from a ...