THE EFFECT OF OCCLUSION OF THE CAROTID ARTERIES ON HEART RATE AND RESPIRATORY RATE BEFORE AND AFTER DENERVATION OF THE CAROTID SINUS IN NORMAL DOGS

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Abstract
Clamping the carotids in normal unanesthetized dogs produced a rise in the pulse rate. This rise was abolished in 3 dogs by denervation of the carotid sinus. In 1 dog the rise persisted after denervation. Ether anesthesia increased slightly the magnitude of the rise during clamping but this effect was also abolished by denervation in 3 dogs. The average resting pulse rate was higher in 2 dogs after denervation than before. Clamping the carotid arteries produced practically no change in the respiratory rate either before or after denervation of the carotid sinus.

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