Breakthrough in keyhole heart valve replacement

Cardiovascular disease remains the number one cause of death worldwide. Aortic stenosis—the narrowing of the valve that controls blood flow from the heart—is one of the most common heart valve diseases, with up to one ...

Heart valve

In anatomy, the heart valves maintain the unidirectional flow of blood in the heart by opening and closing depending on the difference in pressure on each side. They are mechanically similar to reed valves.

There are four valves in the heart (not counting the valve of the coronary sinus, and the valve of the inferior vena cava):

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