Cardiac arrest

Cardiac arrest is when the heart stops beating, usually due to an electrical problem with the heart. Performing CPR and defibrillation in time can be lifesaving.

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Inserting a pacemaker

An abnormal heart rhythm can cause cardiac arrest and even death. Having a pacemaker inserted may save your life by preventing you from having a cardiac arrest.

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Defibrillators

A defibrillator can save someone's life if they have a cardiac arrest. Learn more about defibrillators and how to find and use one.

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Brugada syndrome

Brugada syndrome can disrupt your heart rhythm, causing palpitations, fainting or in serious cases, cardiac arrest. Read about symptoms and treatment.

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Inserting an internal cardioverter defibrillator

An abnormal heart rhythm can cause cardiac arrest. Having an ICD inserted may save your life by giving you a shock to make your heart beat normally again.

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Heart attack

Acting fast when you notice the warning signs of a heart attack could save a life. Here's how to recognise the symptoms of a heart attack.

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Magnesium deficiency

Magnesium deficiency is when the body doesn’t get all the magnesium it needs. Read more about magnesium deficiency symptoms, diagnosis and causes.

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Long QT syndrome

Long QT syndrome (LQTS) is a disorder of the heart's electrical system that can cause fast, chaotic heartbeats, called arrhythmias.

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Hypothermia

Hypothermia can happen when you are exposed to cold conditions for a long time. Learn symptoms, treatment, and prevention tips here.

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Electric shocks and burns

An electric shock happens when someone touches an electrical energy source, often leading to a burn. Discover the causes symptoms, safety and treatments.

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GHB

GHB is a party drug. It has been linked to date rape and sexual assault. Find out more about the physical effects and consequences of using GHB.

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healthdirect Symptom Checker

Not feeling well? Use the healthdirect Symptom Checker to better understand your symptoms and get advice on when to seek medical attention.

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General anaesthetic (child)

A general anaesthetic is usually a safe and effective way for your child to have an operation or procedure. Most children do not have any problems.

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Sea creature bites and stings

Sea creature stings and bites can be serious due to venom through their teeth, tentacles, spines, or skin. Learn when to get help.

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Magnesium and your health

Magnesium is a nutrient essential for healthy muscles, nerves, bones and blood sugar levels. Read about the benefits of magnesium.

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Potassium and your health

Potassium is a mineral that your body needs so nerves and muscles function well. Read more on the signs of having too much or too little potassium.

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Rhabdomyolysis

Rhabdomyolysis is when muscle tissue breaks down causing a chemical release. It can be life-threatening. Read on for causes, symptoms and treatment.

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Fainting

Fainting is a temporary loss of consciousness when the blood flow to the brain is reduced. See your doctor if you faint, especially the first time.

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Collapsing

Collapsing has a range of causes, often occurring because of fainting. Find out about the causes of collapse and what to do if someone collapses.

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Adrenaline

Adrenaline (epinephrine) is a natural stress hormone. It is also a medicine used in an emergency for severe allergic reactions (anaphylaxis).

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Ice (crystal meth)

Ice, also known as crystal meth, is a very addictive illegal drug. Find out more about ice, including what it is and the dangers of its use.

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Wolff-Parkinson-White syndrome

Wolff-Parkinson-White syndrome (WPW) can cause episodes of fast heartbeat, or tachycardia. Learn more here about the symptoms and treatments for WPW.

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How to perform CPR

CPR or cardiopulmonary resuscitation is first aid for when someone's heart has stopped or they’re not breathing. Learn when and how to perform CPR.

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Heroin

Heroin is an illegal, addictive drug with many side effects. Find out more about the dangers of heroin use, addiction and rehabilitation.

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Cocaine

Cocaine, or 'coke', is an addictive drug that can cause unwanted effects. Learn more about cocaine’s effects and the risks associated with its use.

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Heart arrhythmias

A heart arrhythmia is an irregular heartbeat. Your heart can beat too fast, too slow or irregularly. Learn how to recognise the symptoms here.

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Tachycardia

Tachycardia (if your heart beats faster than usual, more than 100 beats per minute) can be a normal response to exercise or stress or a sign of disease

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