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Atelectasis

No or under ventilation of any part of the lung or even a whole…

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Atherosclerosis

Narrowing and obstruction of circulatory vessels; most common cause of ischemia.

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Atopy

A hereditary tendency to develop IgE-mediated states of hypersensitivity, such as hay fever.

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ATP

Adenosine Triphosphate

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ATS

American Thoracic Society

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Attenuation

The process of causing genetic changes to weaken a pathogen, rendering it nonpathogenic usually…

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Auscultation

Process of listening for sounds within the body (e.g., breathing, heart beat, vascular passage,…

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Autoclave

A machine utilizing pressurized steam that enters a chamber to render items sterile. Most…

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Autoimmune disease

A disease in which the body produces antibodies against its own cells and tissues…

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Autonomic

Acting or occurring involuntarily (autonomic reflexes); relating to, affecting, or controlled by the autonomic…

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Autonomic nervous system (ANS)

The part of the nervous system that is concerned with control of involuntary body…

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