right atrioventricular valve

tri·cus·pid valve

[TA] the valve closing the orifice between the right atrium and right ventricle of the heart; its three cusps are called anterior, posterior, and septal. Synonym(s): valva atrioventricularis dextra [TA], right atrioventricular valve ☆ , valva tricuspidalis ☆ , valvula tricuspidalis

valve

(valv) [L. valva, leaf of a folding door] Any of various membranous structures in a hollow organ or passage that temporarily close to permit the flow of fluid in one direction only.

aortic valve

Abbreviation: AoV
The valve at the junction of the left ventricle and the ascending aorta. It is composed of three segments (semilunar cusps) and prevents regurgitation. See: cardiac valve for illus.

Bauhin valve

See: Bauhin valve

Béraud valve

See: Béraud valve

bicuspid valve

Mitral valve.

Bjork-Shiley heart valve

A synthetic artificial heart valve that is no longer commercially available but remains implanted in thousands of patients. The valve has been known to fracture at its struts during use, which results in death in the majority of cases.

CARDIAC VALVES: with ventricles relapsed

cardiac valve

Any of the four valves that prevent the backflow of blood as it passes into, through, and out of the heart. In order of the entry of the venous blood into the right atrium, they are the tricuspid, pulmonary, mitral, and aortic. See: illustration

Carpentier-Edwards valve

See: Carpentier-Edwards valve.

check valve

A valve that permits fluids or gases to flow in just one direction. Check valves are used in infusion sets to prohibit backflow of fluids during intravenous therapy.

coronary valve

The coronary sinus valve at the entrance of the coronary sinus into the right atrium. Synonym: thebesian valve

eustachian valve

The valve at the entrance of the inferior vena cava.

external nasal valve

The outermost opening of the nose (the alar rim).

flutter valve

A one-way valve used in chest tube drainage systems that allows fluids or gases to flow out of the chest, but does not let them reenter the body Synonym: Heimlich flutter valve; Heimlich valve

Gerlach valve

See: Gerlach valve

high-pressure relief valve

A safety device built into a ventilator circuit that protects the patient from excessively high airway pressures by venting excess pressure into the atmosphere.

Houston valve

See: Houston valve

Huschke valve

Lacrimal plica.

ileocecal valve

A projection of two membranous folds of the ileum of the small intestine into the cecum of the colon. It prevents backup of fecal material into the small intestine. Synonym: valvula coli

inspiratory impedance threshold valve

See: inspiratory impedance threshold valve

internal nasal valve

Nasal valve.

Krause valve

See: Krause, Karl

left atrioventricular valve

Mitral valve.

mitral valve

The valve that closes the orifice between the left cardiac atrium and the left ventricle during ventricular systole. Synonym: bicuspid valve; left atrioventricular valve

nasal valve

The site of greatest obstruction to airflow through the nasal passages. It extends from the bony cave near the piriform aperture into part of the cartilaginous vestibule of the nose. Synonym: internal nasal valve

pop-off valve

A safety valve that releases gas into the atmosphere from a ventilator circuit when the pressure in the circuit exceeds a known, safe level.

TYPES OF MECHANICAL HEART VALVES: A. caged ball valve; B. monoleaflet. C. bileaflet

prosthetic heart valve

A substitute valve used to replace a diseased valve. There are two main types of prostheses: those made from biological tissues, e.g., the heart valves of animals, esp. pigs, and those made from biocompatible materials, e.g., metals or polymers. Biocompatible mechanical valves may be constructed in a variety of ways, e.g., from a ball that moves up and down in a cage; with bileaflet valves that close in the midline; or with a single leaflet (which tilts to open and close). See: illustration

pulmonary valve

The valve at the junction of the right ventricle and pulmonary artery. It is composed of three semilunar cusps and prevents regurgitation of blood from the pulmonary artery back into the right ventricle. See: cardiac valve for illus.

pyloric valve

The prominent circular membranous fold at the pyloric orifice of the stomach. Synonym: valvula pylori

reducing valve

A device to reduce the pressure of gas that has been compressed in a cylinder.