the cardiovascular response , a pressor response with tachycardia , is graded and thought to be due to an increase in sympathetic outflow coupled with removal of vagal tone since it is attenuated in a dose-dependent way by atropine , propranolol , phentolamine , chlorisondamine and adrenal demedullation .
C0039231
tachycardia
C0004259
atropine