Aortic stenosis is a narrowing of the aortic valve, which connects the heart to the rest of the body. It affects millions of people and can be fatal if left untreated. At present, there are no ...

There are three types of bicuspid aortic valves — types 0, 1, and 2. Experts classify these types based on whether the leaflets of the valve have fused to form a ridge. A bicuspid aortic valve is a ...

There are scant data on long-term clinical outcomes and bioprosthetic-valve function after transcatheter aortic-valve replacement (TAVR) as compared with surgical aortic-valve replacement in patients ...

The mitral valve is a flap of tissue that sits in the left side of the heart, between the left atrium and the left ventricle. It keeps blood flowing in the forward direction, from the atrium into the ...

A bicuspid aortic valve is a congenital heart condition that can sometimes make it harder for the heart to pump blood to meet the body’s needs. The aortic valve is one of the four valves in the heart.

Directional-control valves are common in pneumatic systems. They control compressed-air flow to cylinders, rotary actuators, grippers, and other mechanisms in packaging, handling, assembly, and ...