Hello. Welcome to hcm.
causes narrowing of arteries and accelerates atherosclerosis
. This caused him heart attack
. Pain in hand up to arm might be a narrowing of artery
supplying the nerves to arm. Pathology may be in spinal cord
or cervical plexus. Also very rarely it can atypical sign of heart attack.
I adivce you to consult your doctor and get a CT thorax to rule out any compression on nerves and if your doctor suggests,you can undergo angiogram to find out the location of narrowing. Dont take pain killers as it is not good for heart unless prescribed.
All the best