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 ...

THE modern thermionic valve has now become of world-wide importance, not only in connexion with radio broadcasting, but also in its many applications in scientific and commercial instruments, and in ...

Spin device: in this diagram of the spin valve the nanowire runs between a source and drain (both shown in gold) and the locations of the two quantum dots on the nanowire are denoted by the dashed ...

MIT engineers are 3D printing replicas of patients’ hearts in an attempt to improve replacement valve procedures for those living with heart disease. Scientists are creating custom robotic hearts that ...

The National Institute for Health and Care Excellence (NICE) has raised concerns about price variations for valves used in keyhole heart procedures. In a late stage assessment on valves used in ...