This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CHF, Angina Pectoris and Myocardial Infarction, Subject name: Pharmacology
All of the following are the actions of b-adrenoceptor blockers in CHF except: 
Select and explain. 
A. Decrease in moality associated with CHF, B. Antagonism of vasoconstriction due to sympathetic over activity, C. Prevention of pathological remodelling of ventricular myocardium, D. Prevention of dangerous cardiac arrhythmias
B: Antagonism of vasoconstriction due to sympathetic over activity
Answer: B: Antagonism of vasoconstriction due to sympathetic over activity 
Explanation: Beta blockers may actually increase vasoconstriction by antagonizing the vasodilator action of b2 receptors. Decreases moality by reversing LVH. Prevent dangerous cardiac arrhythmias.