Qt Prolongation Syndrome Quiz

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Osler Jay Justo Guzon

Osler Jay Justo Guzon, MD (Cardiology)

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Learn more about QT prolongation syndrome

Content updated on Sep 20, 2022

What is QT prolongation syndrome?

QT prolongation syndrome is heart signaling disorder that can cause fast, chaotic heartbeats (arrhythmias). It can be congenital or occur later in life as the result of some medical conditions, certain drugs or mineral imbalances.

Symptoms of QT prolongation syndrome

  • Losing consciousness

  • Heart beating rapidly before fainting

  • Feel the heart is pounding

  • Family history of sudden death under 50 years old

  • My pulse feels irregular

  • Irregular heartbeat

  • Irregular heartbeat when exercising

Questions your doctor may ask to check for QT prolongation syndrome

Your doctor may ask these questions to diagnose QT prolongation syndrome

  • Have you currently regained consciousness after temporarily losing consciousness?

  • Did you have palpitations before you lost consciousness?

  • Do you feel your heart is pounding?

  • Do you have a family history of sudden death at a young age (under the age of 50)?

  • Does your pulse feel disordered (irregular)?

Treatment for QT prolongation syndrome

Treatment includes lifestyle changes and medications to prevent dangerous heartbeats. Sometimes surgery is needed to implant a device to control the heart's rhythm.

View the symptoms of QT prolongation syndrome

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Shohei Harase

Shohei Harase, MD


Kameda Medical Center, Japan

Yu Shirai

Yu Shirai, MD


Yotsuya Yui Clinic, Japan

Yoshinori Abe

Yoshinori Abe, MD

Internal medicine

Co-founder of Ubie, Inc.

Rohini R

Rohini R, MD

Ear, nose, throat (ENT)

Bayshore Health Centre, India

Seiji Kanazawa

Seiji Kanazawa, MD, PHD

Obstetrics and gynecology (OBGYN)

National Center for Child Health and Development, Japan

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