Adrenomedullary secretion of epinephrine is increased in mild essential hypertension

Hypertension
M C JacobsT Thien

Abstract

To assess whether patients with mild essential hypertension have excessive activities of the sympathoneuronal and adrenomedullary systems, we examined total body and forearm spillovers and norepinephrine and epinephrine clearances in 47 subjects with mild essential hypertension (25 men, 22 women, aged 38.1 +/- 6.7 years) and 43 normotensive subjects (19 men, 24 women, aged 36.5 +/- 5.9 years). The isotope dilution method with infusions of tritiated norepinephrine and epinephrine was used at rest and during sympathetic stimulation by lower body negative pressure at -15 and -40 mm Hg. Hypertensive subjects had a higher arterial plasma epinephrine concentration (0.20 +/- 0.01 nmol.L-1: mean +/- SE) than normotensive subjects (0.15 +/- 0.01) (P < .01). The increased arterial plasma epinephrine levels appeared to be due to a higher total body epinephrine spillover rate in the hypertensive subjects (0.23 +/- 0.02 nmol.min-1.m-2) than the normotensive subjects (0.18 +/- 0.01) (P < .05) and not to a decreased plasma clearance of epinephrine. The arterial plasma norepinephrine level, total body and forearm norepinephrine spillover rates, and plasma norepinephrine clearance were not altered in the hypertensive subjects. The responses of ...Continue Reading

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Citations

Feb 24, 2009·Analytical and Bioanalytical Chemistry·Makoto TsunodaTeruyuki Yanagisawa
Oct 7, 2010·European Journal of Applied Physiology·Andreas RoesslerHelmut Hinghofer-Szalkay
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Dec 8, 2010·Journal of Pain & Palliative Care Pharmacotherapy·H C J L BuscherO H G Wilder-Smith

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