A 16 year old male is referred by high school coach for a physical examination before joining the football team. His elder brother had died suddenly during football practise, no autopsy was done. The patient has a loud systolic murmur on chest auscultation. All of the following would be constant with hypertrophic cardiomyopathy, EXCEPT
A crescendo-decrescendo systolic murmur
Murmur radiating to neck
Brisk carotid upstroke
Increase in murmur during valsalva or standing