Sit or lie down and rest
Slow your breathing
Drink water
Avoid caffeine, nicotine, alcohol, and stimulants
Cool down if you are overheated
Loosen tight clothing
Try gentle vagal maneuvers only if you have been told they are safe for you
Reduce stress and anxiety
Take prescribed heart medicines exactly as directed
Treat fever, pain, or dehydration
Get regular sleep
Avoid sudden intense activity
Seek urgent medical help if you have chest pain, shortness of breath, fainting, severe dizziness, or a very fast heart rate that does not come down