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 hyperophic cardiomyopathy, except-
A crescendo-decrescendo systolic murmur Murmur radiating to neck Brisk carotid upstroke Increase in murmur during valsalva or standing