Medical research

New design for mechanical heart valves

The heart's valves, which guarantee the unidirectional flow of blood from one chamber to another, are asymmetrical. For example, the two flaps of the heart's mitral valve – which regulates blood flow between the left ...

Cardiology

FDA favors innovative heart valve for the frail

The first artificial heart valve designed to be implanted without major surgery appears to help patients who are too frail to undergo chest-opening surgery, according to federal health reviewers.

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