the initial bradycardia and hypotension were abolished by chlorisondamine or atropine but not reduced by any other pretreatment , whereas the variable heart rate response was converted to a marked , sustained tachycardia by ganglionic blockade or atropine and to a consistent bradycardia by propranolol and peripheral sympathectomy .
C0428977
bradycardia
C0033497
propranolol