This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
Drugs to be avoided in Hyperophic obstructive cardiomyopathy is 
Select and explain. 
A. Amiodarone, B. Verapamil, C. Beta blockers, D. Digoxin
D: Digoxin
Answer: D: Digoxin 
Explanation: stepwise antihypeensive therapy effectively controlled both obstructive HCM symptoms and hypeension. ... Avoid digitalis, because glycosides are contraindicated except in patients with uncontrolled atrial fibrillation. Refer kDT 7/e p517