This is a very difficult question to answer..But if you're in an abusive relationship..you should always protect yourself no matter what. If someone is hurting you, you should break up with them in a very subtle way. (Try not to make them angry) You may love your partner..but the relationship isn't healthy. They will keep abusing you even if they apologize and promise to stop. Your safety is important.
Advise Mr. Walker to call 911 and be seen in the emergency room. SOA, pressure in the chest and sweating (diaphoresis) are i indicators of heart attack. I would suggest a low dose of baby aspirin too to thin the blood in the event it is a heart attack.