Fig. 1

Typical recordings of carotid sinus pressure (CSP), splanchnic sympathetic nerve activity (SNA), the 5-s moving-average signal of the percentage of SNA (m-SNA), systemic arterial pressure (AP) and heart rate (HR). CSP was changed stepwise from 60 to 180 mmHg in 20-mmHg increments every minute. Angiotensin II (ANG II) was administered intravenously while the CSP perturbation was continued. ANG II significantly increased SNA, AP and HR. Reflex responses in SNA, AP and HR were not attenuated in the presence of ANG II. Dashed boxes indicate the step cycles used for the statistical analysis