| AVC | aberrant ventricular conduction; Academy of Veterinary Cardiology; aortic valve closure; associative... |
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| AVD | aortic valvular disease; apparent volume of distribution; atrioventricular dissociation; Army Veteri... |
| AVE | aortic valve echocardiogram |
| AVR | accelerated ventricular rhythm; antiviral regulator; aortic valve replacement |
| AVS | aortic valve stenosis; arteriovenous shunt; auditory vocal sequencing |
| bare lymphocyte syndrome | <syndrome> Absence of HLA antigens on peripheral mononuclear cells, which may result in immunodeficiency. (05 Mar 2000) |
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| Barlow's syndrome | <syndrome> Also referred to as mitral valve prolapse, systolic click-murmur syndrome, floppy-valve syndrome and billowing mitral leaflet syndrome. A common, but highly variable (most individuals are asymptomatic), clinical syndrome that has been described in up to 7% of all females in the 14 to 30 age group. There is also an increased familial incidence suggesting an autosomal dominant form of inheritance. (27 Sep 1997) |
| Barlow syndrome | <syndrome> Late apical systolic murmur or (so-called "mid-late") systolic click, or both, due to massive billowing of the anterior and/or posterior (mural) mitral valvular leaflet into the left atrial cavity (also, floppy valve syndrome); electrocardiographically, ST-T changes in a posteroinferior distribution resembling those of myocardial ischemia often coexist for unknown reasons; rhythm disturbances may coexist with this syndrome without demonstrable pathogenetic relationship. (05 Mar 2000) |
| Barrett's syndrome | <syndrome> Chronic peptic ulceration of the lower oesophagus, which is lined by columnar epithelium, resembling the mucosa of the gastric cardia, acquired as a result of long-standing chronic oesophagitis; oesophageal stricture with reflux, and adenocarcinoma, also have been reported. Synonym: Barrett's oesophagus. (05 Mar 2000) |
| Bart's syndrome | <syndrome> A form of epidermolysis bullosa with blistering of the extremities and intertriginous areas, erosions of the mouth, and deformed nails; probably autosomal dominant; there is often spontaneous improvement with no residual scarring. (05 Mar 2000) |
| Bartter's syndrome | <syndrome> A clinical syndrome characterised by enlargement of certain kidney cells, alkalosis, hypokalaemia and increased production of the hormone aldosterone. Common in children and may be seen in dwarfism. (27 Sep 1997) |
| basal cell nevus syndrome | <syndrome> An inherited group of defects which involve abnormalities of the skin, eyes, nervous system, endocrine, glands and bones. The condition is characterised by an unusual facial appearance and a predisposition for skin cancer. (27 Sep 1997) |
| Basan's syndrome | <syndrome> Ectodermal dysplasia with hypotrichosis, hypohidrosis, defective teeth, and unusual dermatoglyphics. (05 Mar 2000) |
| Bassen-Kornzweig syndrome | <syndrome> A rare congenital disorder that causes the body to not produce chylomicrons, low density lipoprotein (LDL) and very low density lipoprotein (VLDL). Individuals with this condition are unable to properly digest fats. Other findings include ataxia, peripheral neuropathy and other forms of nerve dysfunction. Treatment includes vitamin E. (27 Sep 1997) |
| battered child syndrome | <radiology> Multiple assymetrical fractures, separation of distal epiphyses, irregularity and fragmentation of metaphyses, bucket-handle fracture, corner fracture of elbow, knee, ankle (sudden twisting motion), isolated spiral fracture, extensive periosteal reaction (subperiosteal haemorrhage), exuberant callus formation, cortical hyperostosis extending to epiphyseal plate, avulsion fracture at ligamentous insertion, subdural haematoma (most common), brain atrophy (up to 100%), infarction (50%), subdural hygroma, encephalomalacia, porencephaly (12 Dec 1998) |
| battered spouse syndrome | <syndrome> Physical, psychological, and emotional injuries in a person subjected to abuse by a spouse or domestic partner; usually associated with alcoholism in the abusing spouse. (05 Mar 2000) |
| Bauer's syndrome | <syndrome> Aortitis and aortic endocarditis as a little recognised manifestation of rheumatoid arthritis. (05 Mar 2000) |
| Bazex's syndrome | <syndrome> Erythematous to plum-coloured scaly acral skin lesions, paronychia, and nail dysplasia; associated with cancer of the upper respiratory or upper alimentary tract. Synonym: paraneoplastic acrokeratosis. (05 Mar 2000) |
| Beckwith syndrome | <syndrome> This syndrome, of unknown cause, is characterised by a group of the following findings: large tongue, organ enlargement (visceromegaly), large body size, umbilical hernia and neonatal hypoglycaemia. Evidence suggests a genetic lesion. Birth weight is often more than 8 pounds. Complications include Wilm's tumour, seizures, aspiration and hypoglycaemia. (27 Sep 1997) |
| Beckwith-Wiedemann syndrome | <syndrome> This syndrome, of unknown cause, is characterised by a group of the following findings: large tongue, organ enlargement (visceromegaly), large body size, umbilical hernia and neonatal hypoglycaemia. Evidence suggests a genetic lesion. Birth weight is often more than 8 pounds. Complications include Wilm's tumour, seizures, aspiration and hypoglycaemia. (27 Sep 1997) |