First aid, If you believe someone is having a heart attack:
- Make sure the person feels, rests and tries to stay calm.
- Loosen any tight fitting garment.
- Ask your doctor if you take medicine for chest pain, such as nitroglycerin, for a known heart disease and help you take it.
- If pain does not go away quickly with rest or within 3 minutes after taking nitroglycerin, seek emergency medical help.
- If the person is unconscious and does not react, call the local emergency number