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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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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Brugada syndrome

Brugada syndrome is a genetic condition that causes problems with your heart rhythm. Find out here about the symptoms, causes and treatment.

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Atrial fibrillation

Atrial fibrillation (AF or Afib) is a heart rhythm problem that can increase your risk of stroke. Find out about the symptoms and treatment for AFib.

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Bradycardia

Bradycardia is a slower than normal heart rate. Find out about the symptoms, causes and treatments for bradycardia, and when to see your doctor.

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Pacemaker

A pacemaker is a medical device put in the chest to correct an irregular heartbeat, heart muscle problems or other heart conditions.

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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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Potassium deficiency

Potassium is a mineral that helps nerves and muscles function properly. Read more about potassium deficiency, symptoms, diagnosis and causes.

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Implantable cardioverter defibrillators (ICD)

You may need an ICD, or ACID (automated implantable cardioverter defibrillator) if you have an abnormally fast or irregular heartbeat. Learn why here.

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Heart palpitations

When you have palpitations you are suddenly aware of your heartbeat. Read about the causes, related symptoms and what to do if you have palpitations.

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Calcium channel blockers (CCB)

Find out what the most common types of calcium channel blockers are used for, how they work and any side effects associated with taking them.

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Tachycardia

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

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Beta blockers

Beta blockers are medicines used to treat some heart and other conditions. Learn about the potential side effects, benefits and how they work.

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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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Heart failure

Heart failure is when your heart cannot pump enough blood. Read about the symptoms, causes, diagnosis and treatments for heart failure.

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Heart valve disease

If your heart valves do not work well, your blood flow is affected, putting strain on your heart. Lifestyle changes can help prevent disease.

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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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Shock

Shock is when not enough blood circulates around the body to deliver oxygen to your organs. It can be fatal. Learn how to help someone with shock.

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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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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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Rheumatic heart disease

Rheumatic heart disease is when your heart valves are damaged by rheumatic fever. Learn more about how this can be prevented and treated.

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Primary aldosteronism

Primary aldosteronism is a condition where you make too much of the hormone aldosterone — find out about the symptoms, causes and treatments.

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Lightheadedness

Lightheadedness or feeling woozy is when you feel like fainting or passing out. Know when to see your doctor and how to manage lightheadedness.

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Muscular dystrophy

Muscular dystrophy is a group of inherited diseases that cause muscle weakness. Learn more about the different types, symptoms and treatment options.

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Blackouts

A blackout is a temporary loss of consciousness. It can be caused by fainting, or a more serious issue. Learn more about blackout treatments here.

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Resting heart rate

Resting heart rate is the number of times your heart beats per minute when you are at rest. Learn what's normal for heart health and how to check it.

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Heart

The heart pumps blood around the body to supply body cells with nutrition and oxygen. Find out about how it works and related health problems.

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Obstructive sleep apnoea (OSA)

Obstructive sleep apnoea (OSA) is when your airway partly or completely blocks while you are asleep. Read about OSA symptoms and treatments here.

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Cardiomyopathy

Cardiomyopathy is a condition that affects your heart muscle. Find out about the different types of cardiomyopathy, symptoms and treatments.

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Aortic valve replacement

The aortic valve is in your heart. It helps keep blood flowing in the right direction. Learn how to prepare for an aortic valve replacement operation.

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