<prompt> All are true regarding hyperophic cardiomyopathy except-Digoxin is helpfulIrregular thickness of septaDynamic obstructionDouble apical impulse  <response>: Ref :Harrisons 19th E pg 1568 Digoxin increases the contractility of hea. As contractility increases there is higher chance of obstruction, as the hyperophied septum comes in proximity with the anterior leaflet of the mitral Valve. 