heart valve

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heart valve

[′härt ‚valv]
(anatomy)
Flaps of tissue that prevent reflux of blood from the ventricles to the atria or from the pulmonary arteries or aorta to the atria.
References in periodicals archive ?
Artificial valves last only 10 to 20 years, creating problems not only for children who have heart operations, but also for adults who need new heart valves at age 40 and may have to face a second operation at age 50 or 60.
The new approach to heart valve replacement could potentially have a number of significant advantages over the options currently available, the researchers say.