What is Long QT Syndrome

Long QT Syndrome (LQTS) is a heart rhythm disorder that affects the electrical activity of the heart. It is characterized by an abnormality in the heart's QT interval, which is the time it takes for the heart to recharge between beats.

LQTS can be inherited or acquired:

• Inherited LQTS is caused by genetic mutations that affect the ion channels responsible for regulating the heart's electrical activity.


• Acquired LQTS can be triggered by certain medications, electrolyte imbalances, or medical conditions.

Symptoms of LQTS:

• Fainting or seizures (syncope)


• Rapid, irregular heartbeats (arrhythmias)


• Heart palpitations

LQTS can lead to life-threatening arrhythmias:

• Torsades de pointes is a specific type of arrhythmia associated with LQTS that can cause sudden cardiac arrest.

Treatment options:

• Medications can be prescribed to regulate the heart's electrical activity.


• Implantable cardioverter-defibrillator (ICD) may be recommended to deliver an electric shock if a life-threatening arrhythmia occurs.


• Lifestyle modifications, such as avoiding triggers and maintaining a healthy lifestyle, can also help manage LQTS.