Sure, My Husband 61yo, Has Been C/o Sharp Pain Between

sure, my husband 61yo, has been c/o sharp pain between his shoulder blades for 2 days. This am he said the pain is migrating down his left arm (not numbness), overall general malise . his blood pressures is 137/77, P is 77. he does have a hx of HTN., he has taken his noormal bp meds and although it seems a bit elevated, his body has always compensated. Warm compresses seem to aleviate the pain in the upper back