If you suspect the symptoms of a heart attack, dial 112 immediately and ask for an ambulance.
Symptoms of a heart attack can include:
Chest pain – a sensation of pressure, tightness or squeezing in the centre of your chest
Pain in other parts of the body – it can feel as if the pain is travelling from your chest to your arms (usually the left arm is affected, but it can affect both arms), jaw, neck, back and abdomen
Feeling lightheaded or dizzy
Shortness of breath
Feeling sick (nausea) or being sick (vomiting)
An overwhelming sense of anxiety (similar to having a panic attack)
Coughing or wheezing
Although the chest pain is often severe, some people may only experience minor pain, similar to indigestion. In some cases, there may not be any chest pain at all, especially in women, the elderly and people with diabetes.
It's the overall pattern of symptoms that helps to determine whether you are having a heart attack.
Waiting for the ambulance
If someone has had a heart attack, it's important to rest while they wait for an ambulance, to avoid unnecessary strain on the heart.
If aspirin is easily available and the person who has had a heart attack isn't allergic to it, slowly chew and then swallow an adult-sized tablet (300mg) while waiting for the ambulance.
The aspirin helps to thin the blood and restore the heart's blood supply.
To carry out a chest compression on an adult:
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.
Using your body weight (not just your arms), press straight down by
5-6 cm on their chest.
Repeat this until an ambulance arrives.
Aim to do the chest compression's at a rate of 100-120 compression's a minute.
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 suggesting 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 and you don't have access to an automated external defibrillator (AED), you should perform chest compression's, as this can help restart the heart.
Angina and heart attacks
Angina is a syndrome (a collection of symptoms caused by an underlying health condition) caused when the supply of oxygen-rich blood to the heart becomes 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 medication, unlike the symptoms of a heart attack.
If you have angina, you may have been prescribed medication that improves your symptoms within five minutes. If the first dose doesn't work, a second dose can be taken after five minutes, and a third dose after a further five minutes.
If the pain persists, despite taking three doses of glyceryl trinitrate over 15 minutes, call 112 and ask for an ambulance.