Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0020538 (hypertension)
 170,190 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A case of unsuspected acute amphetamine abuse by a 22-year-old girl which led to serious intracranial hypertension during anaesthesia for a neurosurgical procedure is described. It was difficult to maintained anaesthesia with an intermittent positive-pressure ventilation technique using muscle relaxants, N2O and O2 and supplements of fentanyl despite large doses of pancuronium and fentanyl. The differing effects of chronic and acute amphetamine dosage on anaesthetic requirements are reviewed.
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PMID:Acute amphetamine abuse. Problems during general anaesthesia for neurosurgery. 53 36

A case of amphetamine abuse in late pregnancy is reported. The presenting features of convulsions, confusion, agitation with hypertension and proteinuria led to a diagnosis of eclampsia for which a caesarean section was performed. Investigations and differential diagnosis of convulsions in late pregnancy are reviewed. A general urinary drug screen gives results after 24 hr whereas, if amphetamine abuse is suspected, this can be confirmed within three hr if a specific test for urinary amphetamines is performed. The sympathomimetic effects of a single dose of amphetamine are contrasted with the depression of the sympathetic nervous system which occurs after long-term use. Implications for anaesthesia are discussed.
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PMID:Amphetamine ingestion presenting as eclampsia. 229 97

Amphetamine abuse may be complicated by intracerebral, subdural or subarachnoid haemorrhage. The causative mechanism is probably a combination of vasculitis and induced hypertension. Most cases of intracerebral haemorrhage are subcortical. Only one case of amphetamine-induced intracerebral haematoma where there was also an underlying arteriovenous malformation has been previously reported. We report two cases of intracerebral haematoma due to amphetamine abuse whether an underlying AVM was found at the time of surgery. This possibility should be considered in cases of amphetamine-induced intracerebral haemorrhage.
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PMID:Intracerebral haemorrhage due to amphetamine abuse: report of two cases with underlying arteriovenous malformations. 778 36

Hypertension is the commonest cause of intracerebral hemorrhage (ICH) but non-hypertensive intracerebral hemorrhages (NHICH) are not rare. We report three interesting cases of NHICH subsequent to amyloid angiopathy, alcoholic hepatitis and amphetamine abuse. They suggest the importance of recognizing these conditions and need for urgent specific therapy which may play a vital role in therapeutic planning and prevention of ICH.
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PMID:Non-hypertensive intracerebral haemorrhage: some interesting observations. 1690 99

ABSTRACT The pertinent literature was reviewed on cardiovascular changes induced by psychostimulant medication treatment of hyperactive children. An assessment of 15 controlled studies using test doses of methylphenidate revealed a significant elevation of the resting heart rate in previously unmedicated children (mean + 11 beats/min) but, with continued drug treatment, only a minor insignificant increase (mean + 4 BPM) is observed. Methylphenidate resulted in no consistent or clinically meaningful blood pressure changes (8 studies) and no EKG irregularities (4 studies). Available data for dextroamphetamine and pemoline were less extensive, but showed essentially no significant cardiovascular changes in hyperactive youth. Stimulant overdoses in nonhyperactive children often led to hypertension and tachycardia, but were associated with only one cardiovascular fatality (amphetamine). Comparable studies of these stimulants in adults revealed: (1) tachycardia and hypertension following high test doses of methylphenidate, (2) hypertension but no tachycardia following high test doses of dextroamphetamine, (3) far greater cardiovascular changes following the parenteral administration of stimulants, (4) the development of a prominent degree of tolerance to the cardiovascular effects of stimulants with continued use, (5) very infrequent cardiovascular changes (3%) in medically ill, older adults following stimulant treatment for depression, and (6) infrequent cardiomyopathy and arteritis in association with amphetamine abuse, but not with pemoline or methylphenidate use. The stimulant-induced changes in children are modest in comparison with changes in cardiovascular functioning associated with normal daily activities, and are not comparable to the risks that can occur with tricyclic antidepressants. There appears to be a wide margin of cardiovascular safety when standard psychostimulants are taken orally in customary doses for long periods by hyperactive children. In view of the numerous negative studies, it probably is not essential to monitor heart rate, blood pressure, or EKG prior to or during routine psychostimulant treatment of children and adolescents with ADHD, unless there are comorbid cardiovascular abnormalities.
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PMID:Relative cardiovascular safety of psychostimulants used to treat attention-deficit hyperactivity disorder. 1963 Jun 10

Khat chewing, though a tradition followed majorly in African countries, has of late spread widely across the globe due to faster transport systems and advanced preservation techniques. Many complications such as psychosis, arterial hypertension, angina pectoris, and myocardial infarction have been reported in connection to khat abuse. We present a case of a young man who presented with acute onset left-sided weakness. He was a known khat addict for over three decades. A diagnosis of left hemiplegia due to right middle cerebral artery infarction was established. Detailed evaluation revealed no significant underlying cause for stroke. Since the main central nervous system effects of khat are comparable with those of amphetamines and there are established reports of stroke in amphetamine abuse, the former was assumed to be the etiological factor. The patient was discontinued from taking khat and was managed conservatively. The subject showed significant recovery with no further complications or similar episodes during follow-up. To the best of our knowledge, this is the second case of stroke associated with khat. Since the management is essentially conservative, a vigilant history eliciting of khat abuse in prevalent countries would cut down unnecessary healthcare costs.
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PMID:Khat and stroke. 2256 31

Amphetamine abuse may be complicated by intracerebral, subdural or subarachnoid haemorrhage. The causative mechanism is probably a combination of vasculitis and induced hypertension. Most cases of intracerebral haemorrhage are subcortical. Only one case of amphetamine-induced intracerebral haematoma where there was also an underlying arteriovenous malformation has been previously reported. We report two cases of intracerebral haematoma due to amphetamine abuse where an underlying AVM was found at the time of surgery. This possibility should be considered in cases of amphetamine-induced intracerebral haemorrhage.
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PMID:Intracerebral haemorrhage due to amphetamine abuse: report of two cases with underlying arteriovenous malformations. 2816 6