The 9 month old child of o diabetic mother presents with tachypnea and hepatomegaly, Echo cardiography of (he hea showed normal cardiac morphology with asymmetric septal hyperophy, Which of the following you will give to treat this child -

Ref: Harrison&;s 19th E pg 1568 This is most probably a case of HOCM. In HOCM, there is asymmetrical septal hyperophy. During contraction, the hyperophied septum comes in proximity with the anterior leaflet of the mitral Valve, which leads to obstruction. So drugs that decrease the contractility of hea can be used for hocm. The drug of choice for HOCM is Beta-blockers.