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How do I know if I’m having a heart attack?

A heart attack happens when there is sudden loss of blood flow to your heart muscle. It can be life threatening. If you suspect you or someone else is suffering a heart attack, call 999 immediately.

Although they vary from person to person, common signs of a heart attack include:

  • Chest pain or discomfort a sudden tightness or feeling of pressure in the centre of the chest. Pain levels can range from mild to severe

  • Pain in other parts of the body it can feel as if pain is travelling from your chest to your arms (although the left is more usually affected), neck, jaw, back or stomach

  • Sweatiness a cold, clammy feeling

  • Nausea or vomiting

  • Indigestion, or heartburn-type pain. This is very often ignored in the hope that it will pass

  • Light-headedness

  • Shortness of breath

  • Coughing or wheezing

  • Overwhelming anxiety

  • Unusual fatigue, exceptional tiredness

Women are more likely to experience a heart attack without chest pain, so need to pay special attention to the other, ‘silent’ symptoms too. These silent symptoms include fatigue and indigestion-type pain. Women are also more likely to delay seeking medical attention and treatment.

People with diabetes may not feel the classic chest pain as they may have some nerve damage as a result of their condition. If you're concerned, seek medical advice.

If you are worried that you may be having a heart attack, call 999 immediately.

Some people confuse a heart attack with cardiac arrest – however, these are not the same thing. A heart attack can come before cardiac arrest. A person who goes into cardiac arrest may experience heart attack-like symptoms such as chest pain or dizziness beforehand. With these similarities, discover how to tell the difference.

Common signs and symptoms of cardiac arrest:

  • They appear not to be breathing

  • They’re not moving

  • They don’t respond to any stimulation, such as being touched or spoken to

Recent studies have shown that women who have cardiac arrests are more likely to die than men. This could be because they are less likely to be resuscitated by a bystander, or because people assume women are less likely to experience cardiac arrest.

If you are worried that someone has gone into cardiac arrest, it is important to call 999 immediately and perform CPR until the ambulance arrives.