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: Medicine
All are the true regarding hyperophic obstructive cardiomyopathy, except- 
Select and explain. 
A. Systolic dysfunction, B. Concentric hyperophy, C. Diastolic dysfunction, D. Double apical impulse
A: Systolic dysfunction
Answer: A: Systolic dysfunction 
Explanation: Ref:Harrison's 19th E pg 1569 It is diastolic dysfunction. At the level of the sarcomere, hyperophic cardiomyopathy mutations lead to enhanced calcium sensitivity, maximal force generation, and ATPase activity. Calcium handling is affected through modification of regulatory proteins. Sarcomere mutations lead to abnormal energetics and impaired relaxation, both directly and as a result of hyperophy.