What is it?

Long QT refers to a heart condition, congenital or acquired, that may cause arrhythmias and even sudden cardiac death. Q-T is an interval in the ECG which represents the time it takes the ventricle’s muscles contract and recover. Congenital long QT syndrome refers to some genetic mutations in the ion channels that are found in the myocytes. Due to these mutations, there is a delay in the heart’s electrical activity. Acquired long QT may be caused due to some medications. If someone in your family has LQT syndrome, it is important to get screened.

66 Alikes with Long QT Syndrome (LQTS)

Learn from others
who are experiencing
Long QT Syndrome (LQTS).

Additional names

This group contains additional names:
- Long QT Syndrome

Signs & symptoms

Not all people with long QT have symptoms. Symptoms may include fainting, seizures and sudden death. Triggers for symptoms differ in different types of LQT but may include exercise, being startled and during sleep or while waking up.


Diagnosis is based upon findings from medical history and physical examination. Further evaluation may include ECG and a stress test.


Treatment includes medications such as beta blockers, avoiding triggers and an implantable cardioverter defibrillator (ICD).

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

Learn more about our editorial process for content accuracy.

Alike Wisdom

Instantly get answers to medical questions with our AI, built from the collective wisdom of our community facing similar experiences

Thank you! Your submission has been received!

Find people who are
experiencing a similar
medical reality

100% Free