This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
All are the true regarding hyperophic obstructive cardiomyopathy, except: 
Select and explain. 
A. Digitalis is useful, B. Left ventricular outflow obstruction, C. Asymmetrical septal thickness, D. Double apical impulse
A: Digitalis is useful
Answer: A: Digitalis is useful 
Explanation: Answer is A (Digitalis is useful) Repeat Digitalis is contraindicated in hyperophic obstructive cardiomyopathy (HOCM). Digitalis causes an increase in myocardial contractility which increases the degree of obstruction in HOCM and worsens the condition. Drugs Contraindicated in HOCM are Drugs that increase myocardial Contractility DigitalisQ Sympathomimetic aminesQ b agonist Drugs which decrease ventricular volume (preload) NitratesQ DiureticsQ Any increase in myocardial contractility or decrease in ventricular volume (preload) increase the degree of obstruction in HOCMQ