Hi I have heard of cayenne before for that. Aspirin can damage the stomach although it has been touted as a blood thinner. Celery seed is listed on the net for the heart.
When a person has something that they don't think is immediately life threatening they usually treat them or send them home with instructions to see the doctor with an appointment. If there is something they worry that might happen on the way such as a heart attack they send them by ambulance to have trained people who can do cardio-pulmonary resuscitation on the way with proper equipment, meds etc. that an ordinary person would not have available to them.