drug treatment aiming to reduce or suppress these processes and their negative results is potentially offered by : vasodilators , counteracting vasoconstriction , low dose selective beta 1-adrenoceptor blockers , which will not only impair tachycardia but also up-regulate cardiac beta 1-receptors and hence improve the inotropic response to catecholamines ;
C0034783
adrenoceptor
C0001642
beta 1-receptors