<prompt> Standing increases murmur intensity inAoic stenosisAoic regurgitationHyperophic obstructive cardiomyopathyMitral stenosis  <response>: The classic ECG finding in hyperophic obstructive cardiomyopathy is large dagger-like septal Q waves in the lateral -- and sometimes inferior -- leads due to the abnormally hyperophied interventricular septum.. Wolff-Parkinson-White, or WPW, syndrome can be associated with HOCM The murmur that is pathognomonic for HCM is a crescendo-decrescendo holosystolic murmur best heard at the left sternal boarder. The murmur classically increases with standing and valsalva, while it decreases with squatting, hand-grip, and passive leg lift . Ref Davidson edition23rd pg 463 