<prompt> All of the following are the actions of βblockers in CHF except:Decrease in mortality associated with CHFAntagonism of vasoconstriction due to sympathetic overactivityPrevention of pathological remodelling of ventricular myocardiumPrevention of dangerous cardiac arrhythmias  <response>: Beta blockers may actually increase vasoconstriction by antagonizing the vasodilator action of β2 receptors. 