Heart Attack (Myocardial Infarction)

The symptoms of a heart attack can include:

• chest pain – the chest can feel like it’s being pressed or squeezed by a heavy object, often described as “band-like” in nature. The pain can radiate from the chest to the jaw, neck, arms (particularly the left arm) and back.
• shortness of breath
• feeling weak, lightheaded or both
• an overwhelming feeling of anxiety
• collapse

It’s important to know that not everyone experiences severe chest pain during a heart attack. This is particularly the case in women. The pain can often be mild and mistaken for indigestion.

It’s the combination of symptoms that’s important in determining whether a person is having a heart attack rather than the severity of chest pain.

Coronary heart disease (CHD) is the leading cause of heart attacks.

CHD is a condition in which the major blood vessels that supply the heart get clogged with deposits of cholesterol, known as plaques.

During a heart attack, a coronary plaque bursts (ruptures), causing a blood clot to develop at the site of the rupture.

The clot may block the supply of blood to the heart muscle, triggering a heart attack. If treated quickly in hospital (within minutes or hours) the potential long-term damage to the heart may be significantly reduced.

During the initial onset of a heart attack, it may help to chew and then swallow a tablet of aspirin (ideally 300mg), if the person having a heart attack is not allergic to aspirin.

Aspirin helps to thin the blood and improves blood flow to the heart.

In hospital, treatment for a heart attack depends on how serious it is.

The 2 main treatments are:

• using medicines to dissolve blood clots
• surgery to help restore blood to the heart

The time it takes to recover from a heart attack will depend on the amount of damage to your heart muscle.

Most people can return to work after having a heart attack. Some people are well enough to return to work after 2 weeks. Other people may take several months to recover. How quickly you can go back to work depends on your health, the state of your heart and the type of work you do.

The recovery process aims to:

• reduce your risk of another heart attack through a combination of lifestyle changes (such as eating a healthy diet), and medicines (such as statins), which help to lower blood cholesterol levels
• gradually restore your physical fitness so you can resume normal activities (cardiac rehabilitation)

Find out more about recovering from a heart attack

The complications of a heart attack can be serious and possibly life threatening. These include:

• arrhythmias – an irregular heart rhythm. One type is where the heart begins beating faster and faster, then stops beating (cardiac arrest)
• cardiogenic shock – where the heart’s muscles are severely damaged and can no longer contract properly to supply enough blood to maintain many body functions
• heart rupture – where the heart’s muscles, walls or valves split apart (rupture)

These complications can happen quickly after a heart attack and are a leading cause of death.

Many people die suddenly from a complication of a heart attack before reaching hospital or within the 1st month after a heart attack.

The outlook often depends on:

• age – serious complications are more likely as you get older
• the severity of the heart attack – how much of the heart’s muscle has been damaged during the attack
• how long it took before a person received treatment – treatment for a heart attack should begin as soon as possible

Find out more about complications of a heart attack

There are 5 main steps you can take to reduce your risk of having a heart attack (or having another heart attack):

• smokers should quit smoking
• lose weight if you’re overweight or obese
• do regular exercise – adults should do at least 150 minutes (2 hours and 30 minutes) of moderate-intensity aerobic activity each week, unless advised otherwise by the doctor in charge of your care
• eat a low-fat, high-fibre diet, including wholegrains and at least 5 portions of fruit and vegetables a day
• moderate your alcohol consumption