Document Detail

The influence of restraint on blood pressure in the rat.
MedLine Citation:
PMID:  9523769     Owner:  NLM     Status:  MEDLINE    
We examined the influence of procedures used in blood pressure measurement on blood pressure and the effects of antihypertensive agents. Subjects were spontaneously hypertensive rats (SHR) and their Wistar/Kyoto (WKY) controls. Blood pressure was recorded by telemetry. Twenty-four h baseline pressure were measured, and the effect of minor handling on blood pressure and heart rate was examined. The influence of restraint such as is used for tail-cuff blood pressures was examined. The effects of three different antihypertensive drugs was also examined in the SHR. In the home-cage environment, the SHRs showed higher systolic blood pressures, but had similar hypertensive responses to minor handling as the WKYs. Both strains had elevated heart rate and blood pressure when restrained in the manner used for tail-cuff readings. The antihypertensive effects of captopril and losartan in the SHR were unchanged when the animals were restrained but the hypotensive effect of hydralazine was greater. These results confirm that significant changes in heart rate and blood pressure can occur as a result of the minor procedures frequently used in blood pressure recording in both SHR and WKY rats. This suggests that telemetry may have significant advantages as a method for continuous blood pressure monitoring. The pharmacological profile of antihypertensive drugs may well be different in animals where telemetry is employed and are not subject to the stresses involved in previous methods of monitoring blood pressure.
R J Irvine; J White; R Chan
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of pharmacological and toxicological methods     Volume:  38     ISSN:  1056-8719     ISO Abbreviation:  J Pharmacol Toxicol Methods     Publication Date:  1997 Nov 
Date Detail:
Created Date:  1998-05-07     Completed Date:  1998-05-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9206091     Medline TA:  J Pharmacol Toxicol Methods     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  157-62     Citation Subset:  IM; S    
Department of Clinical and Experimental Pharmacology, University of Adelaide, Australia.
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MeSH Terms
Antihypertensive Agents / pharmacology
Blood Pressure / drug effects,  physiology*
Blood Pressure Determination
Captopril / pharmacology
Heart Rate / drug effects*,  physiology
Hydralazine / pharmacology
Losartan / pharmacology
Rats, Inbred SHR
Rats, Inbred WKY
Restraint, Physical
Telemetry / methods
Reg. No./Substance:
0/Antihypertensive Agents; 114798-26-4/Losartan; 62571-86-2/Captopril; 86-54-4/Hydralazine

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