A patient presents with shoness of breath. On clinical examination, he is found to have a heaving apex and a systolic murmur that intensifies on Valsalva's maneuver. The most likely diagnosis is-

Hyperophic cardiomyopathy (HCM) is a condition in which a poion of the hea becomes thickened without an obvious cause.This results in the hea being less able to pump blood effectively.Symptoms vary from none to feeling tired, leg swelling, and shoness of breath. It may also result in chest pain or fainting.Complications include hea failure, an irregular heabeat, and sudden cardiac death Ref Davidson 23rd edition pg 453