in vivo in 10 healthy volunteers isoprenaline-induced tachycardia was antagonized with equal potency by the beta-2 adrenoceptor-selective antagonist ici 118,551 and the beta-1 adrenoceptor-selective antagonist bisoprolol indicating that it is mediated by cardiac beta-1 and beta-2 adrenoceptor stimulation to about the same degree .
C0022245
isoprenaline
C0039231
tachycardia