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Part of the Hardware glossary: AV, an abbreviation for audio/video, is frequently used as a generic term for the audio and video components and capabilities in home entertainment system and related product descriptions and reviews. This was last updated in February 2011.
Avascular necrosis (AVN) is a disorder resulting from a temporary or permanent loss of blood supply to the bone. Blood carries essential nutrients and oxygen to the bones. When the blood supply is disrupted (avascular), the bone tissues begin to break down (necrosis). This can weaken the bone and eventually result in its collapse. If this occurs near a joint, it can lead to the collapse of the joint surface, resulting in pain and inflammation (arthritis).