Pressor Hormones in Elderly Hypertensive Persons

The purpose of this study was to examine pressor hormones and platelet o^-adrenergic receptors in elderly unmedicated free-living subjects. Eighty-seven subjects, 70±5 years old (mean±SD), hypertensive or nonnotensive (blood pressure < 160/90 mm Hg) were recruited for measurement of blood levels of norepinephrine, epinephrine, and vasopressin, as well as density and affinity of «2-adrenergic receptors from platelet membranes, assessed by maximal...