Symptoms of a heart attack include:

• Chest pain or pressure, or a strange feeling in the chest.
• Sweating.
• Shortness of breath.
• Nausea or vomiting.
• Pain, pressure, or a strange feeling in the back, neck, jaw, upper belly, or one or both shoulders or arms.
• Dizziness or lightheadedness.
• A fast or irregular heartbeat.

The more of these symptoms you have, the more likely it is that you're having a heart attack. Chest pain or pressure is the most common symptom, but some people, especially women, may not notice it as much as other symptoms. You may not have chest pain at all but instead have numbness, tingling, or a strange feeling in your chest or other areas.

If you have symptoms of a heart attack, call 911 or other emergency services immediately. After calling 911 or other emergency services, you should chew and swallow one adult-strength (325 mg) or 2 to 4 low-dose (81 mg) aspirin unless you cannot take aspirin because of allergy or some other reason. By calling 911 and taking an ambulance to the hospital, you may be able to start treatment before you arrive at the hospital.