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Chew and swallow an aspirin, unless you are allergic to aspirin or have been told by your doctor never to take aspirin. But seek emergency help first, such as calling.
Take nitroglycerin, if prescribed. If you think you're having a heart attack and your doctor has previously prescribed nitroglycerin for you, take it as directed. Do not take anyone else's nitroglycerin, because that could put you in more danger.
Begin CPR if the person is unconscious. If you're with a person who might be having a heart attack and he or she is unconscious, tell the dispatcher or another emergency medical specialist. You may be advised to begin cardiopulmonary resuscitation (CPR). If you haven't received CPR training, doctors recommend skipping mouth-to-mouth rescue breathing and performing only chest compressions (about per minute). The dispatcher can instruct you in the proper procedures until help arrives.
If an automated external defibrillator (AED) is available and the person is unconscious, begin CPR while the device is retrieved and set up. Attach the device and follow instructions that will be provided by the AED after it has evaluated the person's condition.
First Call for Help Then Do CPR.
