Category: A
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Axis deviation
A shift of the normal electrical vectors of the heart, seen sometimes as a result of conduction disease, enlargement of the chambers of the heart, obstructive lung disease, or other conditions. In electrocardiography, the term is used to signify a change in the heart’s electrical axis based on its position. This change is described as…
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Anionic detergent
A natural or synthetic chemical substance with disinfectant properties due to the presence of an active, negatively charged chemical group.
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Actinic dermatitis
A chronic red or eczematous rash, usually on the face or exposed skin surfaces, that typically results from exposure and sensitization to ultraviolet rays. Adults over age 50 may be affected.
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Androgen deprivation
The chemical suppression of male sex hormones to prevent their stimulatory effects on various hormone-sensitive illnesses, including prostate cancer and predatory sexual behavior.
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Apoplectic dementia
Sudden loss of cognitive or intellectual function as a result of a large or bloody stroke or a brain tumor. A type resulting from a stroke that leads to the softening of brain tissue.
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Alcoholic dementia
A form of toxic dementia in which there is loss of memory and problem-solving ability after many years of alcohol abuse. The ultimate phase of cognitive decline caused by excessive drinking and long-term alcohol abuse. An extended type of cognitive decline that manifests in the advanced stages of long-term alcohol abuse.
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Alcohol dehydrogenases
An enzyme that catabolizes ethyl alcohol (ethanol) in the liver. When ethanol is consumed in relatively large amounts, it is instead catabolized by the microsomal ethanol oxidizing system, also in the liver.
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Ascending degeneration
Nerve fiber degeneration progressing to the center form the periphery.
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Amyloid degeneration
Degeneration of organs or tissues from amyloid deposits. The deposits are waxy and translucent and have a hyaline appearance. The liver, spleen, and kidneys are usually involved, but any tissue may be infiltrated. A waxy deterioration happens in chronic diseases like tuberculosis, where starch-like substances accumulate in body tissues. This inhibits the function of organs…
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Anterior deformity
Abnormal anterior convexity of the spine.