Dear Ma m I understand your concern for him. Most important step in management of heart attack is to identify it correctly. The characteristic feature is pain or heaviness behind breastbone, radiation to arms, jaw or upper abdomen, associated with shortness of breath and sweating. There may be nausea, vomiting and giddiness. But there may be atypical features. Once identified correctly, call medical help. Make him rest. Do not let him eat or drink anything till first medical contact. There are medications which should be given as first aid but if identified wrongly, they can do harm too. Hope this helps. Sincerely Sukhvinder