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Long QT syndrome

1-minute read

Long QT syndrome (LQTS) is a disorder of the heart's electrical system that can cause fast, chaotic heartbeats, called arrhythmias. It is named after the distinctive pattern seen on an electrocardiogram (ECG or heart tracing).

If you have long QT syndrome, you may have been born with a gene that puts you at risk. It might also be caused by certain medications. 

People with long QT syndrome may experience fast or irregular heartbeats, fainting or seizures. If the heart is beating erratically for a long period it can cause cardiac arrest in some people, and possibly sudden death. 

Treatment for long QT syndrome often involves limiting physical activity, avoiding certain medications or taking medications to help prevent the development of fast or irregular heartbeats. Some people with long QT syndrome may also need surgery and an implantable device to control the rhythm of the heart. 

Follow the links below to find trusted information about long QT syndrome.

Last reviewed: May 2018

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Long QT syndrome - myDr.com.au

Find out about Long QT syndrome, and how an electrical problem in the heart can cause a very fast heart beat and sudden death.

Read more on myDr website

Long QT syndrome | Sydney Children's Hospitals Network

Long QT syndrome (LQTS) is a heart rhythm disorder, which can cause periods of abnormally fast heart rhythm called arrhythmias

Read more on Sydney Children's Hospitals Network website

Long QT syndrome - Better Health Channel

You should be investigated for long QT syndrome if you faint for no apparent reason, during or after exercise or emotional excitement.

Read more on Better Health Channel website

Arrhythmia | myVMC

Arrhythmia is a condition characterised by the hearts failure to contract or beat at the correct time

Read more on myVMC – Virtual Medical Centre website

Arrhythmias (abnormal heart rhythms)

Arrhythmia is when you have an abnormal heart rhythm and heart palpitations are an awareness of your heartbeat.

Read more on WA Health website

What are arrhythmias? | The Heart Foundation

An arrhythmia is an abnormal heart rhythm. Find out about arrhythmia causes, diagnosis and treatment.

Read more on Heart Foundation website

Heart arrhythmias and palpitations - Better Health Channel

A heart that beats irregularly, too fast or too slow, is experiencing an arrhythmia.

Read more on Better Health Channel website

What is atrial fibrillation - arrhythmia? | The Heart Foundation

Atrial fibrillation is an irregular heartbeat (arrhythmia) that can lead to heart failure and other heart-related complications. Learn the causes, symptoms, and treatments.

Read more on Heart Foundation website

Atrial fibrillation

Atrial fibrillation is one of a number of disorders commonly referred to as arrhythmias, where your heart does not beat normally.

Read more on WA Health website

Heart conditions - atrial fibrillation

Atrial fibrillation (AF) is a type of arrhythmia, which means that the heart beats in an irregular fashion. This is caused by a distortion of electrical messages that control the steady rhythm of the heart, which we know as the ‘heartbeat’.

Read more on Better Health Channel website

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