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: Pediatrics
Which of the following drugs is not given in dilated cardiomyopathy? 
Select and explain. 
A. Beta blocker, B. Calcium channel blocker, C. Spironolactone, D. ACE inhibitors
B: Calcium channel blocker
Answer: B: Calcium channel blocker 
Explanation: b. Calcium channel blocker(Ref: Nelson's 20/e p 2275)Treatment of Dilated Cardiomyopathy:Drugs used include diuretics, ACE inhibitors, angiotensin receptor blockers, digitalis, b-blockers (carvedilol or metoprolol)In patients presenting with extreme degrees of heart failure or circulatory collapse, intensive care measures are often required, including IV inotropes, diuretics, mechanical ventilatory support +- circulatory support, which may include ventricular assist devices, extracorporeal membrane oxygenation (ECMO), and ultimately cardiac transplantation.In patients with DCM and atrial or ventricular arrhythmias, specific antiarrhythmic therapy should be instituted.