heart valve


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heart valve

one of the four structures within the heart that prevent backflow of blood by opening and closing with each heartbeat. The valves include two semilunar valves, the aortic and pulmonary; the mitral or bicuspid valve; and the tricuspid valve. The valves permit blood flow in only one direction; any of the valves may become defective, permitting the backflow associated with heart murmurs. Also called cardiac valve. See also heart, mitral valve, semilunar valve, tricuspid valve.
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Heart valves
References in periodicals archive ?
This US FDA approval of the company's new Masters HP 15mm rotatable mechanical heart valve was primarily based on the results of a clinical trial, which enrolled paediatric patients five years of age or younger who had a diseased, damaged or malfunctioning heart valve.
Technavio's report, Global Heart Valves Market 2016-2020, has been prepared based on an in-depth market analysis with inputs from industry experts.
On the basis of product type, PMR has segmented the transcatheter heart valve replacement & repair market into TAVR (Transcatheter Aortic Valve replacement) and TMVR (Transcatheter Mitral Valve Repair).
Prof Ben Bridgewater, Heart Valve Voice chairman and a consultant cardiac surgeon, called for all areas to consider the treatment.
Heart Valve Voice said the data highlighted "a worrying trend of under diagnosis, low referrals and inadequate treatment of heart valve disease" - which predominantly affects the over 65s.
Ellis adds that it's especially important to tell your doctor about any symptoms you have, such as shortness of breath, lightheadedness or chest pain, as these can signal heart valve trouble.
Leon, five-year follow-up data in a small number of patients reveal no reports of valve malfunction using the investigational heart valve.
Studies of the bioprosthetic heart valve materials are being achieved with the subdermal implantation to the rat or direct cardiac implantation to the sheep or cow.
The Edwards SAPIEN transcatheter aortic heart valve integrates balloon-expandable stent technology with a replacement tissue heart valve.
Heart valve disease may lead to breathing problems, irregular heartbeat, and congestive heart failure.
The current treatments for heart valves damaged from malformations before birth or later changes caused by infections or aging include donated human valves, mechanical heart valves or valves from other species such as pigs.
contact lenses, central venous catheters and needleless connectors, endotracheal tubes, intrauterine devices, mechanical heart valves, pacemakers, peritoneal dialysis catheters, prosthetic joints, tympanostomy tubes, urinary catheters, and voice prostheses).