...) and cardiopulmonary receptor activity provided by passive leg raising. 2. In seven normotensive subjects carotid baroreceptors were gradedly stimulated by progressively increasing carotid transmural pressure through a neck chamber device, the resulting reflex lengthening in R–R interval being measured in the two...

...-grip and cold-pressor test, (ii) the heart rate changes occurring during baroreceptor stimulation and deactivation by injection of phenylephrine and trinitroglycerine, and (iii) the heart rate and blood pressure changes occurring with alteration in carotid baroreceptor activity by a neck chamber. Each...

... by increasing and reducing sympathetic vasoconstrictor tone via carotid baroreceptor deactivation and stimulation (neck chamber technique). 2. During the pressor response (15 ± 3 mmHg, mean ± se) plasma noradrenaline and adrenaline showed various changes in the different subjects and on average were...

... subjects are only marginally explained by differences in baroreflex function. © 1980 The Biochemical Society and the Medical Research Society 1980 age baroreflexes blood pressure variability essential hypertension heart rate neck chamber phenylephrine trinitroglycerine Clinical Science...