annulus valves

См. также в других словарях:

• Mitral annulus — The mitral annulus is a fibrous ring that is attached to the mitral valve leaflets. Unlike prosthetic valves, it is neither circular nor continuous. The annulus contracts and reduces its surface area during systole to help provide complete… …   Wikipedia

• Mitral regurgitation — See also: aortic insufficiency and tricuspid insufficiency Mitral regurgitation Classification and external resources Mitral regurgitation (schematic drawing) During systole, contraction of the left …   Wikipedia

• Mitral valve — Anterior (frontal) view of the opened heart. White arrows indicate normal blood flow. (Mitral valve labeled at center right.) …   Wikipedia

• Mitral valve prolapse — Mitral valve prolapses Classification and external resources In mitral valve prolapse, the leaflets of the mitral valve prolapse back into the left atrium. ICD 10 …   Wikipedia

• Downhole safety valve — A downhole safety valve refers to a component on an oil and gas well, which acts as a failsafe to prevent the uncontrolled release of reservoir fluids in the event of a worst case scenario surface disaster. It is almost always installed as a… …   Wikipedia

• petroleum production — Introduction       recovery of crude oil and, often, associated natural gas from the Earth.        petroleum is a naturally occurring hydrocarbon material that is believed to have formed in deep sedimentary (sedimentary rock) beds from animal and …   Universalium

• Well integrity — is defined by [http://www.standard.no/imaker.exe?id=5738 NORSOK D 010] as “Application of technical, operational and organizational solutions to reduce risk of uncontrolled release of formation fluids throughout the life cycle of a well”. There… …   Wikipedia

• Completion (oil and gas wells) — This article is about the oil or gas well completion. For other uses of completion, see Completion (disambiguation) In petroleum production, completion is the process of making a well ready for production (or injection). This principally involves …   Wikipedia

• Advanced Boiling Water Reactor — The Advanced Boiling Water Reactor (ABWR) is a Generation III reactor boiling water reactor. The ABWR was designed by General Electric. The standard ABWR plant design has a net output of about 1350 MWe, however General Electric Hitachi (GEH)has… …   Wikipedia

• Consolidated Safety-Valve Co. v. Crosby Steam Gauge & Valve Co. — Consolidated Safety Valve Co. v. Crosby Steam Gauge Valve Co. Supreme Court of the United States Argu …   Wikipedia

• Marian Ionescu — Marian Ion Ionescu Marian Ion Ionescu (born 21 August 1929) is a pioneer British cardiac surgeon who spent his professional life initially in his native Romania and afterwards, the main part of his productive life in Great Britain. His interest… …   Wikipedia