| benign positional vertigo | Brief attacks of paroxysmal vertigo and nystagmus that occur solely with certain head movements or positions, e.g., with neck extension; due to labyrinthine dysfunction. Synonym: positional vertigo of Barany, postural vertigo. (05 Mar 2000) |
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| positional vertigo of Barany | Brief attacks of paroxysmal vertigo and nystagmus that occur solely with certain head movements or positions, e.g., with neck extension; due to labyrinthine dysfunction. Synonym: positional vertigo of Barany, postural vertigo. (05 Mar 2000) |
| benign paroxysmal postural vertigo | A recurrent, brief form of postural vertigo occurring in clusters; believed to result from displaced remnants of utricular otoconia. Synonym: cupulolithiasis. (05 Mar 2000) |
| positional | Of or pertaining to position. "Ascribing unto plants positional operations." (Sir T. Browne) Source: Websters Dictionary (01 Mar 1998) |
| positional cloning | Cloning a gene based simply on knowing its position in the genome without any idea of the function of that gene. Because this is the reverse of how things have been traditionally done, it has also been called reverse genetics. (12 Dec 1998) |
| positional information | The instructions that are interpreted by cells to determine their differentiation in respect of their position relative to other parts of the organism, for example digit formation in the limb bud of vertebrates. (18 Nov 1997) |
| positional nystagmus | Nystagmus occurring only when the head is in a particular position. (05 Mar 2000) |
| positional probability | <chemistry> A type of probability that depends on the number of arrangements in space that yield a particular state. (09 Jan 1998) |
| benign paroxysmal peritonitis | familial paroxysmal polyserositis |
| paroxysmal | <cardiology, neurology> Recurring in paroxysms, spasms or seizures. (18 Nov 1997) |
| paroxysmal atrial tachycardia | Bouts of rapid, regular heart beating originating in the atrium (upper chamber of the heart). Due to abnormalities in the av node relay station that lead to rapid firing of electrical impulses from the atrium which bypass the av node under certain conditions. These conditions include alcohol excess, stress, caffeine, overactive thyroid or excessive thyroid hormone intake, and certain drugs. Pat is an example of an arrhythmia where the abnormality is in the electrical system of the heart, while the heart muscle and valves may be normal. (12 Dec 1998) |
| paroxysmal cerebral dysrhythmia | A diffusely abnormal electroencephalogram often seen with epilepsy. (05 Mar 2000) |
| paroxysmal cold haemoglobinuria | <haematology> A rare blood disorder caused by antibodies which destroy red blood cells upon exposure to the cold. The antibodies are formed against a specific blood group and are triggered by the cold. The cause is unknown but the disease has been associated with syphilis and some viral infections. Serum haemoglobin and urine haemoglobin are increased during the attacks. The disease is chronic and treatment is difficult. Some cases resolve spontaneously without treatment. Origin: Gr. Ouron = urine (27 Sep 1997) |
| paroxysmal nocturnal dyspnea | Acute dyspnea appearing suddenly at night, usually waking the patient after an hour or two of sleep; caused by pulmonary congestion with or without oedema that results from left-sided heart failure following immobilization of fluid from dependent areas after lying down. (05 Mar 2000) |
| paroxysmal nocturnal dyspnoea | <cardiology> Wakening in the middle of the night with shortness of breath. A symptom of left ventricular failure. (15 Nov 1997) |