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Symptoms

Call 999 immediately if you think someone might be having a heart attack. The faster you act, the better their chances.

Symptoms of a heart attack

Symptoms of a heart attack can include:

  • chest pain – a feeling of pressure, heaviness, tightness or squeezing across your chest
  • pain in other parts of the body – it can feel as if the pain is spreading from your chest to your arms (usually the left arm, but it can affect both arms), jaw, neck, back and tummy
  • feeling lightheaded or dizzy
  • sweating
  • shortness of breath
  • feeling sick (nausea) or being sick (vomiting)
  • an overwhelming feeling of anxiety (similar to a panic attack)
  • coughing or wheezing

The chest pain is often severe, but some people may only experience minor pain, similar to indigestion.

While the most common symptom is chest pain, symptoms can vary from person to person. Some people may have other symptoms such as shortness of breath, feeling or being sick and back or jaw pain without any chest pain.

Waiting for an ambulance

If you have had a heart attack, it's important that you rest while you wait for an ambulance, to avoid unnecessary strain on your heart.

If aspirin is available and you are not allergic to it, slowly chew and then swallow an adult-size tablet (300mg) while you wait for the ambulance.

Aspirin helps to thin your blood and improve blood flow to your heart.

Cardiac arrest

In some cases, a complication called ventricular arrhythmia can cause the heart to stop beating. This is known as sudden cardiac arrest.

Signs and symptoms that suggest a person has gone into cardiac arrest include:

  • they appear not to be breathing
  • they're not moving
  • they don't respond to any stimulation, such as being touched or spoken to

If you think somebody has gone into cardiac arrest, call 999 immediately and start doing cardiopulmonary resuscitation (CPR).

If there is someone with you, ask them to find an automated external defibrillator (AED) and use it as soon as you can.

Hands-only CPR (chest compressions)

To do chest compressions on an adult:

  1. Place the heel of your hand on the breastbone at the centre of the person's chest. Place your other hand on top of your first hand and interlock your fingers.
  2. Using your body weight (not just your arms), press straight down by 5 to 6cm on their chest.
  3. Repeat this until an ambulance arrives.

Aim to do 100 to 120 compressions a minute. Watch CPR training videos on the British Heart Foundation website.

Find out about how to resuscitate a child.

Automated external defibrillator (AED)

If you have access to an AED, you should use it. An AED is a safe, portable electrical device that most large organisations keep as part of first aid equipment.

It helps to establish a regular heartbeat during a cardiac arrest by monitoring the person's heartbeat and giving them an electric shock if necessary.

Find out more about automated external defibrillators (AED) on the Arrhythmia Alliance website

Angina and heart attacks

Angina is chest pain caused by the supply of oxygen-rich blood to the heart becoming restricted.

People with angina can experience similar symptoms to a heart attack, but they usually happen during exercise and pass within a few minutes.

However, occasionally, people with angina can have a heart attack. It's important to recognise the difference between the symptoms of angina and those of a heart attack. The best way to do this is to remember that the symptoms of angina can be controlled with medicine, but symptoms of a heart attack cannot.

If you have angina, you may have been prescribed medicine (glyceryl trinitrate) that improves your symptoms within 5 minutes. If the first dose does not work, a second dose can be taken after 5 minutes.

Call 999 if the second dose does not work after 5 minutes.

Call 999 sooner if the pain gets worse or you feel unwell, for example feeling sick, dizzy or short of breath.

Last Reviewed
31 July 2023
NHS websiteNHS website
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Hedgegrail Pharmacy in Stoke Poges offers a wide range of prescription and over-the-counter medications, as well as health and beauty products
Company Registration: 2041755
Premises GPhC: 1099892
Superintendent: Baljit Singh Bahra
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