<prompt> A young man has HO of breathlessness while walking to gym. On examination he has ejection murmur which increase on Valsalva manouvcr. ECO shows LVH with deep Q wave In anterior chest leads. He should avoidRegular walking in gymVerapamilDigitalisSublingual nitroglycerine  <response>: Ref :Harrison;s 19th E pg 1568. cardiac glycosides should be avoided, as they may increase contractility and worsen obstruction. 