What is Sinusitis?

Inflammation of the lining of the cavities in the bone surrounding the nose (the sinuses), usually as a result of a bacterial infection spreading from the nose. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Sinus bradycardia?

A regular heart rate of less than 60 beats per minute. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Sinus?

A cavity within bone or a channel that contains blood; also refers to an abnormal tract in the body. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Sinoatrial Node?

The structure that regulates the heartbeat; a natural “pacemaker”. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Single photon emission computed tomography?

An imaging technique in which a radioactive substance is introduced into the body and the radiation emitted by the substance is detected by a camera and is transformed into cross-sectional images by a computer. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Silicosis?

A respiratory disease caused by inhalation of dust containing the mineral silica. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Silicone?

A group of compounds of silicon and oxygen; commonly used as implants in cosmetic surgery because they resist body fluids and are not rejected by the body. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is Sigmoidoscopy?

An examination of the rectum and the lowest part of the large intestine using a flexible viewing tube inserted through the anus. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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What is SIDS?

See Sudden infant death syndrome. Reference: •American Medical Association Definitions of Medical Terms – https://www.ama-assn.org

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