Healthdirect Free Australian health advice you can count on.

Medical problem? Call 1800 022 222. If you need urgent medical help, call triple zero immediately

healthdirect Australia is a free service where you can talk to a nurse or doctor who can help you know what to do.

beginning of content

Heart attack

9-minute read

Call triple zero (000) immediately if you or someone else may be having a heart attack.

Key facts

  • A heart attack occurs when the blood supply to the heart is blocked and your heart muscle can’t get enough oxygen.
  • A common symptom of a heart attack is chest pain that may spread to your arms, neck, jaw or back.
  • Heart attacks are mostly caused by coronary heart disease which starves your heart of oxygen.
  • You can reduce your risk of having a heart attack by adopting healthy lifestyle habits.

What is a heart attack?

To work properly, your heart needs a continuous supply of oxygen-rich blood. It normally receives this from blood vessels called coronary arteries. When a coronary artery suddenly becomes completely blocked, oxygen can’t get to your heart muscle — which causes a heart attack (or, ‘myocardial infarction’).

Heart attack is a medical emergency: without oxygen, the muscle begins to die and your heart can become permanently damaged.

Heart attacks can be fatal — every day, 21 Australians die from heart attack. One patient is admitted to hospital due to heart attack every 9 minutes.

What are the symptoms of a heart attack?

If you have any of the symptoms above, you could be having a heart attack. If symptoms are severe, get worse quickly, or last longer than 10 minutes, call triple zero (000) immediately and ask for an ambulance. If calling triple zero (000) does not work on your mobile try calling 112.

The most common symptoms of a heart attack include:

Women may experience different symptoms, such as:

  • breathlessness and generally feeling unwell
  • tightness or discomfort in the arms
  • back pain or pressure

Heart attack symptoms differ from person to person. Some people experience no warning signs before a heart attack while others feel symptoms days or weeks in advance. Nearly 1 in 3 men and nearly 4 in 10 women who have heart attacks don’t feel any chest pain at all. Chest pains may also come and go.

CHECK YOUR SYMPTOMS — Use the chest and back pain Symptom Checker and find out if you need to seek medical help.

What causes heart attacks?

The most common cause of a heart attack is coronary heart disease. This is where fatty deposits, cholesterol and other substances build up in the walls of the coronary arteries that supply oxygen to the heart. Over time, this build-up hardens into plaque that can break off at any time and cause a blood clot which blocks the artery.

In some cases, heart attacks have another cause:

  • Coronary artery spasm (variant angina) is an unusual narrowing of blood vessels that can stop blood flow to the heart.
  • Spontaneous coronary artery dissection is a sudden tear in the wall of a coronary artery, which can also affect people who have few risk factors for heart disease.

Certain lifestyle factors are shown to increase your chances of heart disease and having a heart attack.

  • Smoking damages your blood vessels and makes you 3 times more likely to die of a heart attack.
  • An unhealthy diet high in saturated fat, salt and added sugar puts you at risk of heart disease.
  • Not enough physical activity — more than 4 out of 5 Australians aren’t physically active enough.
  • High blood pressure — 1 in 3 Australians live with high blood pressure.
  • High cholesterol — too much ‘bad' LDL cholesterol in your blood is one of the main reasons for a build-up in fatty plaques that block your arteries.
  • Diabetes — people with diabetes are up to 4 times more likely to have a heart attack or stroke.
  • Unhealthy weight — people who are overweight or obese have an increased chance of having a heart attack.
  • Poor mental health — conditions such as depression can increase your risk of heart disease.

When should I see my doctor?

Call triple zero (000) immediately and ask for an ambulance, if you or someone near you experiences symptoms of a heart attack that are:

  1. severe
  2. get worse quickly, or
  3. last longer than 10 minutes

If calling triple zero (000) does not work on your mobile, try calling 112. Early treatment could save a life.

See your doctor regularly to manage your general health, test for heart disease risk factors and help you take steps to prevent a heart attack.

FIND A HEALTH SERVICE — The Service Finder can help you find doctors, pharmacies, hospitals and other health services.

How are heart attacks diagnosed?

If you think you might be having a heart attack, you need to head to a hospital straight away. There, a doctor will assess your symptoms and check your vital signs – blood pressure, pulse and temperature.

There are several tests that help indicate if you’ve had a heart attack, and whether damage was caused, such as:

  • electrocardiogram (ECG) — electrical leads are placed on your chest, arms and legs to record the electrical signals travelling through your heart muscle
  • blood tests
  • chest x-ray
  • angiography (or, coronary catheterisation) — a special fluid is inserted into a blood vessel through a small tube (catheter) to show whether your coronary arteries are narrowed or blocked
  • exercise stress test
  • CT scan or MRI scan

How are heart attacks treated?

The first step in treating a suspected heart attack is to restore blood flow to the heart quickly. Heart muscle cells depend on oxygen and the longer the heart is without oxygen, the more permanent and widespread the damage.

Medications

Treating a heart attack often involves dissolving any blood clots blocking blood flow with medicines called thrombolytics.

Other medications may be prescribed to help reduce the risk of another heart attack. These include:

  • medicines that reduce the blood’s clotting action such as aspirin, anticoagulants (blood-thinning medicines) and anti-platelet agents
  • medicines to lower blood pressure (for example, ACE inhibitors and angiotensin II receptor blockers)
  • beta blockers to slow your heart rate

Surgery

Surgical procedures can help to restore blood flow to the heart, including:

  • Coronary angioplasty — a procedure in which a coronary artery is opened up from the inside using a special balloon inserted through your groin or wrist. The artery may then be kept open with a special metal tube (stent) left inside your artery.
  • Bypass surgery (coronary artery bypass graft surgery, or CABG) — involves redirecting blood to bypass (go around) the blockage in the coronary artery and improve blood flow to your heart.

ASK YOUR DOCTOR — Preparing for an appointment? Use the Question Builder for general tips on what to ask your GP or specialist.

How can I prevent a heart attack?

Making positive lifestyle changes is the best way to lower your risk of a heart attack.

There are a number of ways you can improve your heart health:

There are also other risk factors that you can’t control, like your age, gender, ethnicity and family history.

Speak with your doctor if you’re concerned about your risk factors, and for tips on how you can reduce your risk.

ARE YOU AT RISK? — Are you at risk of type 2 diabetes, heart disease or kidney disease? Use the Risk Checker to find out.

NEED TO LOSE WEIGHT? — Use the BMI Calculator to find out if your weight and waist size are in a healthy range.

Are there complications of a heart attack?

Complications following a heart attack can include:

  • Arrhythmia — your heart may develop an irregular heartbeat following a heart attack due to damaged heart muscles disrupting electrical signals.
  • Heart failure — your heart may have ongoing difficulty pumping enough blood, due to its muscles being too weak or stiff.
  • Cardiogenic shock — where your whole body goes into shock from extensive heart muscle damage.
  • Heart rupture — this is a rare but serious complication in which the heart’s muscles, walls or valves split apart.

These can be dangerous if untreated, but your healthcare team will help to manage them if they occur.

Does COVID-19 cause heart attacks?

Research so far suggests that COVID-19 mostly affects the lungs, but it can also affect the heart and worsen existing conditions.

See the Heart Foundation’s FAQs page for more information about COVID-19 and heart disease.

Life after a heart attack

Recovering from a heart attack can be both emotionally and physically challenging. Hearing stories from others who have experienced a heart attack can help.

The Heart Foundation have shared several people’s “heart stories” on their website.

Resources and support

For more information and support, try these resources:

Other languages

Do you prefer to read languages other than English? The Heart Foundation has fact sheets on heart health translated into more than 25 languages.

Learn more here about the development and quality assurance of healthdirect content.

Last reviewed: June 2020


Back To Top

Need more information?

These trusted information partners have more on this topic.

Top results

Medication after a heart attack | Heart Foundation

Medication after a heart attack | Heart Foundation

Read more on Heart Foundation website

Heart attack

Having one or more signs or symptoms of a heart attack means this is a life-threatening emergency—call triple zero (000) for an ambulance immediately.

Read more on St John Ambulance Australia website

Heart attack - Better Health Channel

Heart attack is an emergency. If you have warning signs of heart attack, get help fast. Call triple zero (000) and ask for an ambulance.

Read more on Better Health Channel website

Heart Attack | Heart Foundation

Understand what a heart attack is, its causes, the warning signs to look out for and what to do if you or someone you know is having one. Read more now

Read more on Heart Foundation website

Heart attack - myDr.com.au

A heart attack (myocardial infarction) means the blood supply to part of the heart muscle has become blocked. Early treatment can reduce muscle damage.

Read more on myDr website

Heart attack recovery – first month | The Heart Foundation

A heart attack can be a life-changing event. Find out what to expect from your recovery in the first month after your heart attack. Read our guide.

Read more on Heart Foundation website

Heart attack - Lab Tests Online AU

Heart attacks occur when oxygen supply to parts of the heart is cut off due to a blockage.

Read more on Lab Tests Online AU website

Acute Coronary Syndromes (Heart Attack and Suspected Heart Attack) Clinical Care Standard: Consumer fact sheet | Australian Commission on Safety and Quality in Health Care

Acute Coronary Syndromes (Heart Attack and Suspected Heart Attack) Clinical Care Standard: Consumer fact sheet Downloads Acute Coronary Syndromes (Heart Attack and Suspected Heart Attack) Clinical Care Standard: Consumer fact sheet Publication year 2014 Resource type Fact sheet or brochure Topics Clinical Care Standards Health conditions, diseases and treatments

Read more on Australian Commission on Safety and Quality in Health Care website

Heart Attack & Stroke Symptoms | Jean Hailes

Recognise the symptoms of a heart attack or stroke. Find out how women may experience different symptoms to men and what to do if you suspect an attack.

Read more on Jean Hailes for Women's Health website

Support after a heart attack | The Heart Foundation

Many different thoughts may go through your head after a heart attack and you may be presented with complicated medical info. Know where to get support.

Read more on Heart Foundation website

Healthdirect 24hr 7 days a week hotline

24 hour health advice you can count on

1800 022 222

Government Accredited with over 140 information partners

We are a government-funded service, providing quality, approved health information and advice

Australian Government, health department logo ACT Government logo New South Wales government, health department logo Northen Territory Government logo Government of South Australia, health department logo Tasmanian government logo Government of Western Australia, health department logo