to evaluate the possible functional antagonism of the calcium antagonists diltiazem and verapamil of the sympathetic nervous system and the renin-angiotensin system , their influence on blood pressure , heart rate , plasma catecholamines and renin activity ( pra ) , and on the reaction of these parameters to exogenous noradrenaline ( na ) and angiotensin ii , was investigated in 8 normotensive volunteers .
C0007412
catecholamines
C0028351
noradrenaline