In which condition intensity of systolic murmur is incre ased-

The intensity of functional systolic ejection murmurs varies, but generally ranges from grades 1 to 3. The intensity typically increases during phase 3 (release phase) of the Valsalva maneuver, following a post-extrasystolic pause and after inhalation of amyl nitriteand AS conditions Ref Davidson 23rd edition pg 455