Category: A
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Asaphia
Inability to produce clear and distinct speech.
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Arthrocentesis
Removal of excess fluid in a joint by inserting a needle into the joint space. Entry into a joint space with a needle to remove fluid. A medical technique involving the insertion of a needle by the physician into the patient’s joint to extract fluid for diagnostic analysis or to evacuate infected fluid from the…
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Arteriovenous fistula
A surgical joining of arterial and venous vessels in order to gain access to circulation during hemodialysis An abnormal direct connection between an artery and vein. Blood flows from the artery into the vein through the fistula, bypassing the bed of capillaries (very small blood vessels) that normally lie between them. If a fistula is…
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Arteriostenosis
Narrowing of the lumen of an artery; may be temporary or permanent.
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Arachnoid layer
The middle layer of the three meninges covering the central nervous system.
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Apoplexia
Sudden, gross bleeding in an organ; stroke caused by bleeding in the brain.
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Aponeurotic fibroma
A recurrent non-metastasizing infiltrating calcification observed most often on the palms of young patients as a small, firm nodule not attached to the dermal layer.
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Apneusticarea
The brain region responsible for coordination of movements and activities essential for transition from inspiration and exhalation.
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Aortoplasty
Surgical repair of the aorta, frequently requiring a graft.
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Aortic coarctation
Congenital narrowing of the aorta.