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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.
AV (atrioventricular): AV is the standard medical abbreviation for atrioventricular, a combination that means pertaining to the atria (the upper chambers of the heart) and the ventricles (the lower chambers of the heart). For example, the AV node is an electrical relay station between the atria and the ventricles. Electrical signals from the atria must pass through the AV node to reach the ventricles.