Figure 1.
Overactive peripheral chemoreceptors in spontaneously hypertensive (SH) rats. Original recordings of carotid sinus nerve (CSN; (a)) activity showing both basal discharge (a,b) and that evoked reflexly by stimulating the carotid body with sodium cyanide (a,c; 22.5 μg NaCN i.a., arrowed in a) in SH and Wistar rats. CSN data from the in situ perfused preparation. (one-way ANOVA Bonferroni post-test; n = 10 or 11, ***P < 0.001). (d), dopamine infusion (10 μg/kg/min i.v.) while recording ventilation frequency in conscious radio-telemetered Wistar and SH rats (n = 5 each) before and after selective carotid body resection (SHR CBR). One-way ANOVA Dunnett’s post-test. * P < 0.05. ***P < 0.001. All data are mean ± s.e.m.