| AS | acetylstrophanthidin; acidified serum; acoustic schwannoma; acoustic stimulation; active sarcoidosis... |
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| AVA | activity vector analysis; antiviral antibody; aortic valve area; aortic valve atresia; arteriovenous... |
| AVO | aortic valve opening; aortic valve orifice; atrioventricular opening |
| SAR | scatter/air ratio; seasonal allergic rhinitis; sexual attitude reassessment; slowly adapting recepto... |
| SVAS | supravalvular aortic stenosis; supraventricular aortic stenosis |
| verminous aneurysm | An aneurysm in horses caused by Strongylus vulgaris larvae; usually involving the mesenteric arteries. Synonym: worm aneurysm. (05 Mar 2000) |
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| Park's aneurysm | An arteriovenous aneurysm in which the brachial artery communicates with the brachial and median basilic veins. (05 Mar 2000) |
| cerebral aneurysm | A dilated and weakened portion of a cerebral blood vessel that is prone to rupture. A cerebral aneurysm may occur as a birth defect or develop as the result of long-standing poorly controlled hypertension. Symptoms of a ruptured cerebral aneurysm include a sudden, severe thunderclap headache that may be associated with nausea, vomiting and a decreased level of consciousness. (27 Sep 1997) |
| Charcot-Bouchard aneurysm | Dilatation in the diameter of small arteries and arterioles secondary to lipohyalinosis from long-standing hypertension associated with intracerebral haematomas. Synonym: Charcot-Bouchard aneurysm. (05 Mar 2000) |
| peripheral aneurysm | A saclike aneurysm springing from one side of an artery, an aneurysm of one of the smaller branches of an artery. (05 Mar 2000) |
| phantom aneurysm | A palpable throbbing aorta, mistaken by novices for an aneurysm. (05 Mar 2000) |
| ruptured aneurysm | An aneurysm that is haemorrhaging into its wall or surrounding tissues. (05 Mar 2000) |
| cirsoid aneurysm | Dilation of a group of blood vessels owing to congenital malformation with arteriovenous shunting. Synonym: cirsoid varix, racemose aneurysm, racemose haemangioma. (05 Mar 2000) |
| miliary aneurysm | Dilatation in the diameter of small arteries and arterioles secondary to lipohyalinosis from long-standing hypertension associated with intracerebral haematomas. Synonym: Charcot-Bouchard aneurysm. (05 Mar 2000) |
| compound aneurysm | An aneurysm in which some of the coats of the artery are ruptured, others intact. (05 Mar 2000) |
| congenital cerebral aneurysm | Localised dilation of a cerebral vessel; usually a berry aneurysm. (05 Mar 2000) |
| worm aneurysm | An aneurysm in horses caused by Strongylus vulgaris larvae; usually involving the mesenteric arteries. Synonym: worm aneurysm. (05 Mar 2000) |
| mural aneurysm | Thinning, stretching, and bulging of a weakened ventricular wall, usually as a result of myocardial infarction; rarely postinflammatory or congenital. Synonym: mural aneurysm, ventricular aneurysm. (05 Mar 2000) |
| consecutive aneurysm | An aneurysm that has enlarged and spread to the surrounding tissues in consequence of rupture of its walls. Synonym: consecutive aneurysm. (05 Mar 2000) |
| coronary aneurysm | Aneurysm of a coronary vessel. A coronary artery aneurysm is rarely congenital; it is usually due to atherosclerosis, inflammatory processes, or a coronary fistula. (12 Dec 1998) |