atropine sulfate ( 0.1 mg/kg iv ) injected during cold blockade of the vagi increased the heart rate by only 6 +/- 4 ( se ) beats/min ( ns ) but rewarming the vagi in five of the six dogs after atropine resulted in an additional heart rate increase ( et ) of 26 +/- 6 beats/min ( p less than 0.005 ) .
C0596005
atropine sulfate
C0039231
et