| Evaluation of intravenous clonidine in hypertensive emergencies. | |
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MedLine Citation:
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PMID: 632367 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Nineteen patients with severe essential hypertension or hypertension due to renal parenchymal disease were treated with intravenous clonidine. In 14 patients the elevated blood pressure was complicated by one or more crises: left ventricular failure in seven patients, encephalopathy in six, and subarachnoid hemorrhage, cerebral hemorrhage, dissecting aortic aneurysm, acute renal failure, and severe epistaxis, one episode each. Clonidine 0.15 or 0.30 mg, was given intravenously every 40 minutes until the diastolic blood pressure was decreased to 120 mm Hg or below. Blood pressure was taken every 10 minutes. Both systolic and diastolic blood pressure were reduced significantly after intravenous clonidine, the former by 96 mm Hg (P less than 0.001), the latter by 52 mm Hg (P less than 0.001) within a period of 40 minutes to 2 1/2 hours. The clonidine dose varied from 0.15 to 0.90 mg, mean 0.52 mg. Heart rate was decreased significantly by 20 beats/minute (P less than 0.001) by the drug. Serious side effects were not observed except for an episode of transient sinoatrial block. Renal function was not affected. Patients who were on chronic diuretic therapy prior to treatment with intravenous clonidine showed a significantly greater decrease in both systolic (P less than 0.01) and diastolic (P less than 0.001) blood pressure after the first clonidine dose. In one patient intravenous clonidine was not effective (i.e., blood pressure remained 200/150 mm Hg) in spite of a total clonidine dose of 0.9 mg. Two patients died, one from severe cerebral hemorrhage, the other from an extensive dissecting aortic aneurysm, but the fatal outcome was not related to clonidine. |
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Authors:
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A P Niarchos |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of clinical pharmacology Volume: 18 ISSN: 0091-2700 ISO Abbreviation: J Clin Pharmacol Publication Date: 1978 Apr |
Date Detail:
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Created Date: 1978-05-24 Completed Date: 1978-05-24 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0366372 Medline TA: J Clin Pharmacol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 220-8 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Clonidine / administration & dosage, adverse effects, therapeutic use* Dose-Response Relationship, Drug Emergencies* Female Humans Hypertension / complications, drug therapy* Hypertension, Malignant / complications, drug therapy Injections, Intravenous Male Middle Aged |
| Chemical | |
Reg. No./Substance:
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4205-90-7/Clonidine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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