Long QT Syndrome (LQTS) is a heart rhythm disorder that affects the way your heart beats. It can cause fast, irregular heartbeats (arrhythmias) that may lead to fainting, seizures, or even sudden cardiac arrest.

The "QT" refers to a segment on an electrocardiogram (ECG or EKG) — it represents the time it takes the heart’s electrical system to recharge between beats. In LQTS, this interval is longer than normal.

It can be:

• Inherited (genetic): Passed down through families (LQT1, LQT2, LQT3, etc.).

• Acquired: Caused by medications, electrolyte imbalances, or medical conditions.

Fainting (especially during exercise or stress)

• Seizure-like activity

• Heart palpitations

• Sudden cardiac arrest (in severe cases)

• Sometimes, no symptoms at all

• Electrocardiogram (EKG/ECG)

• Holter monitor or event monitor

• Genetic testing

• Exercise stress test

• Family history review

Yes, but not curable. Treatment options include:

• Beta-blockers

• Lifestyle changes

• Avoiding QT-prolonging medications

• Implantable cardioverter defibrillator (ICD) in high-risk patients

Depends on the LQT type:

• LQT1: Exercise, especially swimming

• LQT2: Sudden noises or emotions

• LQT3: Sleep or rest (slow heart rate)

Many people live full, active lives by managing triggers, taking medications, and working closely with their cardiologist.

Several drugs can make LQTS worse. There are lists online (like on crediblemeds.org) of QT-prolonging medications to avoid. Always consult your doctor or pharmacist.

It depends on your LQT type and personal risk level. Some activities may be restricted, while others can be safe under guidance. Always consult your cardiologist.

Yes, especially in inherited forms. First-degree relatives (parents, siblings, children) of someone with LQTS should be tested.

• Inherited: You're born with it due to genetic mutations.

• Acquired: It’s caused by outside factors like medications, low potassium/magnesium, or health conditions.

• Wear a medical alert bracelet

• Keep a list of safe/unsafe medications

• Inform teachers, coaches, or employers

• Have an emergency action plan in place

• Get CPR /VLS training for family members

• Get AED training for family members