n.

a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it

device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone

control consisting of a mechanical device for controlling the flow of a fluid

Flow patterns around heart valves
Flow patterns around heart valves: A numerical method
Giant magnetoresistance in organic spin valves
Functional living trileaflet heart valves grown in vitro.
Monolithic microfabricated valves and pumps by multilayer soft lithography.
A randomized study of endobronchial valves for advanced emphysema.
Dabigatran versus warfarin in patients with mechanical heart valves.
Optimal oral anticoagulant therapy in patients with mechanical heart valves.
Activated Interstitial Myofibroblasts Express Catabolic Enzymes and Mediate Matrix Remodeling in Myxomatous Heart Valves
Tunnel magnetoresistance of 604% at 300 K by suppression of Ta diffusion in CoFeB/MgO/CoFeB pseudo-spin-valves annealed at high...