This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
[{'content': 'Beta blockers used in CHF is \nSelect and explain. \nA. Timolol, B. Atenolol, C. Acebutalol, D. Carvedilol', 'role': 'user'}, {'content': 'Answer: D \nExplanation: [D) (Carvedilol): (523-KDT7th edition)CARVEDILQL is a Betaj + Beta2 + Alpha! adrenoceptor blocker produces vasodilatation due to Alpha 1 blockade as well as calcium channel blockade and has antioxidant property. It has been used in hypertension and is the Beta blocker especially employed as cardioprotective in CHF (151-KDT7th)* b1 blockers mainly (metoprolol, bisoprolol, nebivolol) in mild to moderate CHF treated with ACE inhibitor + diuretic digitalis* There is no place for b blockers in decompensated patients. b blockers should be stopped during an episode of acute heart failure and recommended at lower doses followed by uptitration after compensation is restored', 'role': 'assistant'}]