RT Journal
A1 McAllister RG, Jr, Love DW, Guthrie GP, Jr, Dominic J, Kotchen TA
T1 PEripheral ß-receptor responsiveness in patients with essential hypertension
JF Archives of Internal Medicine
JO Archives of Internal Medicine
YR 1979
FD August 1
VO 139
IS 8
SP 879
OP 881
DO 10.1001/archinte.1979.03630450031011
UL http://dx.doi.org/10.1001/archinte.1979.03630450031011
AB Peripheral β-adrenergic receptor sensitivity was characterized in 24 patients with essential hypertension and in 13 agematched normotensive subjects using an isoproterenol hydrochloride bolus dose-response technique. Decreased β-receptor responsiveness to this exogenously administered β-agonist was observed in hypertensive patients; for an equivalent chronotropic effect, higher doses of isoproterenol were required in hypertensive subjects than in normal subjects. Among "normal-renin" hypertensive patients, β-receptor responsiveness was directly related to furosemide-stimulated plasma renin activity (PRA), suggesting that independently stimulated PRA may provide an indirect estimate of endogenous β-receptor sensitivity. Hypertensive patients whose mean arterial pressure fell at least 10 mm Hg after four weeks of treatment with hydrochlorothiazide had even further depression in β-receptor responsiveness, whereas receptor sensitivity was unchanged in patients whose blood pressure was unaffected. Thus, it is unlikely that this decreased receptor responsiveness in patients with untreated essential hypertension is a direct consequence of elevated arterial pressure.(Arch Intern Med 139:879-881, 1979)