An opioid mechanism may help explain hypertensive hypoalgesia. A double-blind placebo-controlled design compared the effects of opioid blockade (naltrexone) and placebo on electrocutaneous pain threshold, pain tolerance, and retrospective McGill Pain Questionnaire ratings in 35 unmedicated patients with essential hypertension and 28 normotensive individuals. The hypertensives experienced less pain than normotensives during the assessment of their pain tolerance; however, this manifestation of hypertensive hypoalgesia was not moderated by naltrexone. These findings fail to support the hypothesis that essential hypertension is characterised by relative opioid insensitivity. (c) 2007 Elsevier B.V. All rights reserved.
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Vet Adm Med Ctr, Res Serv, Ophthalmol, Miami, FL USA
Univ Miami, Miller Sch Med, Ophthalmol Phys Med & Rehabil, Miami, FL USAUniv Miami Hlth Syst, Bascom Palmer Eye Inst, Ophthalmol, Miami, FL USA
Felix, Elizabeth R.
Pondelis, Nicholas J.
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Boston Childrens Hosp, Dept Anesthesiol Crit Care & Pain Med, Anesthesiol, Boston, MA USAUniv Miami Hlth Syst, Bascom Palmer Eye Inst, Ophthalmol, Miami, FL USA
Pondelis, Nicholas J.
Talbert, Cameron
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Boston Childrens Hosp, Dept Anesthesiol Crit Care & Pain Med, Anesthesiol, Boston, MA USAUniv Miami Hlth Syst, Bascom Palmer Eye Inst, Ophthalmol, Miami, FL USA
Talbert, Cameron
Moulton, Eric
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Boston Childrens Hosp, Dept Anesthesiol Crit Care & Pain Med, Anesthesiol, Boston, MA USA
Harvard Med Sch, Ophthalmol, Boston, MA USAUniv Miami Hlth Syst, Bascom Palmer Eye Inst, Ophthalmol, Miami, FL USA
Moulton, Eric
Galor, Anat
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Univ Miami Hlth Syst, Bascom Palmer Eye Inst, Ophthalmol, Miami, FL USA
Vet Adm Med Ctr, Surg Serv, Ophthalmol, Miami, FL USAUniv Miami Hlth Syst, Bascom Palmer Eye Inst, Ophthalmol, Miami, FL USA
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Pontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, BrazilPontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, Brazil
Rabin, M
Antonello, ICF
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Pontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, BrazilPontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, Brazil
Antonello, ICF
Vilhordo, D
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Pontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, BrazilPontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, Brazil
Vilhordo, D
de los Santos, CA
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Pontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, BrazilPontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, Brazil
de los Santos, CA
de Figueiredo, CEP
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Pontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, BrazilPontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, Brazil
de Figueiredo, CEP
Antonello, VS
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Pontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, BrazilPontifica Univ Catolica Rio Grande do Sul, Fac Med, Programa Pos Grad Clin Med, Porto Alegre, RS, Brazil