| AVA | activity vector analysis; antiviral antibody; aortic valve area; aortic valve atresia; arteriovenous... |
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| 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 |
| AMI | Acute Myocardial Infarction - Complications(Cx) 1. Early ... |
| Pott's aneurysm | Dilation and tortuosity of a vein resulting from an acquired communication with an adjacent artery. Synonym: Pott's aneurysm, varix anastomoticus. (05 Mar 2000) |
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| cylindroid aneurysm | The uniform dilation of an artery along a considerable distance. Synonym: cylindroid aneurysm. (05 Mar 2000) |
| saccular aneurysm | A saclike bulging on one side of an artery. Synonym: ampullary aneurysm. (05 Mar 2000) |
| heart aneurysm | An aneurysmal dilatation of a portion of the wall of the ventricle, usually the left, or, rarely, a saccular protrusion through it (false aneurysm of the heart). It is usually consequent to myocardial infarction but other causes such as bacterial endocarditis or trauma have been described. (12 Dec 1998) |
| hernial aneurysm | The protrusion of the stretched inner coats of an artery through a wound in the adventitia. (05 Mar 2000) |
| pulmonary artery aneurysm | Aneurysm of the pulmonary artery; rare in the absence of congenital heart disease. (05 Mar 2000) |
| serpentine aneurysm | Dilation and tortuosity of an artery, sometimes affecting the temporal, splenic, or iliac arteries in the elderly. (05 Mar 2000) |
| supraclinoid aneurysm | An intracranial aneurysm located immediately above the anterior clinoid process of the sphenoid bone. (05 Mar 2000) |
| syphilitic aneurysm | An aneurysm, usually involving the thoracic aorta, resulting from tertiary syphilitic aortitis. (05 Mar 2000) |
| diffuse 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) |
| dissecting aneurysm | Splitting or dissection of an arterial wall by blood entering through an intimal tear or by interstitial haemorrhage; more common in the aorta, for example, with an intimal tear near the aortic valve (Type I) or subclavian artery and distal dissection of the media for a variable distance, frequently rupturing through the outer wall. (05 Mar 2000) |
| dissecting thoracic aneurysm | <surgery> A condition in which a weakened portion of the thoracic aorta begins to tear along the longitudinal axis of the vessel. Symptoms include sudden, severe chest pain that may radiate to the back accompanied by nausea, sweating and difficulty breathing. A common risk factor for this event is atherosclerotic vascular disease and-or hypertension. Advanced cases of syphilis (syphilitic aortitis) can also result in acute thoracic dissection as a complication of infection with Treponema pallidum. (11 Jan 1998) |
| ductal aneurysm | Aneurysm of the patent ductus arteriosus, occurs either in infants or adults. (05 Mar 2000) |
| iliac aneurysm | An aneurysm of the common, internal, or external iliac arteries. (12 Dec 1998) |
| infraclinoid aneurysm | An intracranial aneurysm occurring below the level of the anterior clinoid process of the sphenoid bone. (05 Mar 2000) |