the cardiovascular responses to histamine i.c.v . were abolished by mecamylamine ( 5.0 mg/kg i.v . ) and greatly reduced by 6-hydroxydopamine ( 3 x 250 mug i.c.v . ) , but only the tachycardia was significantly modified by atropine ( 100 mug i.c.v . ) and propranolol ( 1 mg/kg i.v . ) .
C0007226
cardiovascular
C0039231
tachycardia