Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0012833 (dizziness)
 9,689 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

We report a 52-year-old male patient with Shy-Drager syndrome (SDS) complicated by an occurrence of the syndrome of inappropriate secretion of antidiuretic hormone (SIADH). The patient first developed impotence at the age of 48, accompanied by urinary incontinence, and episodes of dizziness while standing. The following year, the patient had developed a staggering gait and speech became monotonous. At age 52, the patient was admitted to the hospital after experiencing frequent episodes of syncope associated with complete loss of consciousness. Upon examination, blood pressure was 100/70 in a recumbent position, and 80/60 when standing. The pulse rate varied from 60 per minute to 62. The patient was alert. The alternating Horner sign was observed, and a paucity of facial movements was visible. His speech was slow and monotonous. Muscle tone was increased bilaterally. There was incoordination. A laboratory examination revealed reduced serum sodium levels of 127 mEq/L and increased sodium excretion with plasma hypoosmolality (262 mOsm/kg/H), urine hyperosmolality and low serum renin activity (0.2 ng/ml/h). Renal functions were normal and the levels of adrenocortical and thyroid hormones were normal. There were no abnormalities observed in the chest roentgenogram taken. The level of antidiuretic hormone (ADH) was unreasonably high (5.74 pg/ml). A water-load test demonstrated failure of both water diuresis and inhibition of ADH secretion. These data suggested that hyponatremia in this case was caused by SIADH. The correlation between plasma osmolality and the concentration of ADH suggested that osmolality that initiates ADH release appeared to have been reset to around 230 mOsm/kg lower than normal.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[Shy-Drager syndrome and the syndrome of inappropriate secretion of antidiuretic hormone]. 161 76

A variety of neurological disturbances may occur in patients receiving ocular administration of timolol. Possible mechanisms include direct effects on neurons of the central nervous system, effects on peripheral vasculature, and cardiac arrhythmias. Interestingly, transient ischemic attacks have not been documented to occur synchronously with timolol-related arrhythmias. We report a case of recurrent dizziness and staggering gait occurring synchronously with timolol related arrhythmias. An attack of amaurosis fugax also occurred. Discontinuing timolol abolished all the symptoms. Pre-existing autonomic dysfunction in our patient may have been an important contributing factor in his symptomatology.
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PMID:Transient ischemic attacks and amaurosis fugax from timolol. 397 21