Low Arterial Pressure in Awake Rabbits Without Carotid Sinus and Aortic Nerves. ∗

Abstract

Summary

Arterial pressure records from awake, sinoaortic denervated, normal or experimental renal hypertensive rabbits showed frequent, large pressure falls, average 40 to 50 mm Hg for 10 to 25 seconds. They usually resulted from body movements which, in rabbits were intact moderator nerves, commonly caused a small, brief pressure rise. Additionally, sinoaortic denervated rabbits occasionally had basic mean pressures below predenervated values. These findings supported the concept that, at least in part, the sinoaortic baroreflex system functions to protect against acute episodes of low arterial pressure.