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Valvular Stenosis
Narrowing of the opening of one or more of the four valves of the heart. (NCI Thesaurus)
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Regurgitation of the blood of the heart valves owning to imperfect closing, insufficiency or incompetency of the valves.
Dysfunction of one of the cardiac valves characterized by incomplete valve closure.
Any heart disorder characterized by a defect in valve structure or function.
Dispensing closure incorporating a product-flow controlling valve within the orifice. Product will not dispense from the package until sufficient squeezing pressure is…
A mechanical device designed to control the flow of a fluid.
A rotating disk attached to a shaft designed to control the opening and closing of a valve.
