| Arterial dilation and reduced wave reflection. Benefit of dilevalol in hypertension. | |
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MedLine Citation:
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PMID: 2737733 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We compared dilevalol (an isomer of labetalol), 200-400 mg daily, against atenolol, 50-100 mg daily, in a double-blind, crossover, placebo-controlled trial with respect to effects on arterial distensibility (measured as pulse wave velocity [PWV]) and wave reflection (assessed from carotid pressure wave contour). Twelve patients of mean age 58 years (range 44-73 years) with essential hypertension (supine diastolic blood pressure 95-114 mm Hg) took active therapy for 12 weeks, separated by a 2-4 week placebo period. Carotid pressure waveforms were recorded noninvasively by applanation tonometry with a Millar micromanometer-tipped probe. PWV was measured between carotid and femoral arteries (aortic PWV), carotid and radial arteries (arm PWV), and femoral and pedal arteries (leg PWV). Early wave reflection was calculated from the ratio of the height of the peak of the carotid wave above its shoulder to the pulse pressure and was expressed as an augmentation index. Both drugs were equally effective in reducing brachial sphygmomanometric pressure and PWV in all three regions (active vs. placebo, p less than 0.001), but there was no significant difference between the two active therapies. However, the augmentation index (averaged during the treatment period) was significantly lower with dilevalol (19%) than with atenolol (28%, p less than 0.01), corresponding to a greater decrease of 5-8 mm Hg in carotid systolic pressure compared with the brachial artery. Although both drugs were equally effective in reducing arterial distensibility, the vasodilating action of dilevalol gave added benefit in reducing wave reflection, presumably through its vasodilatory effect on peripheral conduit arteries. |
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Authors:
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R Kelly; J Daley; A Avolio; M O'Rourke |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article |
Journal Detail:
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Title: Hypertension Volume: 14 ISSN: 0194-911X ISO Abbreviation: Hypertension Publication Date: 1989 Jul |
Date Detail:
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Created Date: 1989-08-10 Completed Date: 1989-08-10 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7906255 Medline TA: Hypertension Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 14-21 Citation Subset: IM |
Affiliation:
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Medical Professorial Unit, St. Vincent's Hospital, Sydney, New South Wales, Australia. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Aorta / physiopathology Arteries / drug effects*, physiopathology Atenolol / therapeutic use Blood Pressure Brachial Artery / physiopathology Carotid Arteries / physiopathology Extremities / blood supply Female Humans Hypertension / drug therapy*, physiopathology Labetalol / therapeutic use* Male Middle Aged Vasodilation / drug effects* |
| Chemical | |
Reg. No./Substance:
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29122-68-7/Atenolol; 36894-69-6/Labetalol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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