<prompt> All of the following are the actions of b-adrenoceptor blockers in CHF except:Decrease in moality associated with CHFAntagonism of vasoconstriction due to sympathetic over activityPrevention of pathological remodelling of ventricular myocardiumPrevention of dangerous cardiac arrhythmias  <response>: Beta blockers may actually increase vasoconstriction by antagonizing the vasodilator action of b2 receptors. Decreases moality by reversing LVH. Prevent dangerous cardiac arrhythmias. 