these results indicate that the redistribution phenomenon occurs only if both a beta adrenoceptor blockade-induced bradycardia and a beta adrenoceptor blockade-induced reinforcement of alpha adrenoceptors-mediated coronary vasoconstrictor tone are simultaneously achieved l-penbutolol alone or in the presence of phenoxybenzamine decreased st-segment elevation in ischemic areas , but this effect was abolished by atrial pacing , confirming the major role of bradycardia in the reduction of ischemic injury .
C0034784
adrenoceptor
C0034783
adrenoceptors