Long QT Syndrome Quiz
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Blacking out
Heart beating rapidly before fainting
Heart palpitations
My heart races when I exercise
Irregular heartbeat
Irregular palpitations
Tachycardia
Not seeing your symptoms? No worries!
What is Long QT Syndrome?
QT prolongation syndrome is a heart signaling disorder that can cause fast, chaotic heartbeats (arrhythmias). It can be present from birth or develop later in life due to certain medical conditions, specific drugs, or mineral imbalances.
Typical Symptoms of Long QT Syndrome
- Fainting
- Pounding, rapid or fluttering heartbeat during exercise
- Family history of sudden death under 50 years old
- Heart beating rapidly before fainting
- Irregular heartbeat
- Heart pounding
- Fast heartbeat (more than 100 beats a minute)
- Irregular heart pounding
Diagnostic Questions for Long QT Syndrome
Your doctor may ask these questions to check for this disease:
- Have you fainted recently?
- Do you get heart palpitations when you exercise?
- Do you have a family history of early sudden death (under 50)?
- Did you have heart palpitations before you fainted?
- Have you been experiencing an irregular heartbeat?
Treatment of Long QT Syndrome
Treatment involves lifestyle changes and medications to prevent dangerous heartbeats. In some cases, surgery may be necessary to implant a device that controls the heart's rhythm.
Reviewed By:
Osler Jay Justo Guzon, MD (Cardiology)
Dr. Guzon graduated from the University of Missouri-Kansas City School of Medicine with a BLA and MD. He then completed his Internal Medicine Residency at St. Louis University before a fellowship in Cardiovascular Diseases at the University of Missouri-Columbia. He has since working as an invasive cardiologist with a particular interest in preventative medicine and cardiometabolic disease. Over the past several years, Dr. Guzon has served on the speaker bureaus of AstraZeneca, Lilly, Boehringer-Ingelheim, and Aralez.
Content updated on Feb 13, 2025
Following the Medical Content Editorial Policy
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People with similar symptoms also use Ubie's symptom checker to find possible causes
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See full list
Symptoms Related to Long QT Syndrome
Diseases Related to Long QT Syndrome
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Link to full study:
https://www.medrxiv.org/content/10.1101/2024.08.29.24312810v1References
Schwartz, P. J., & Woosley, R. L. (2016). Predicting the unpredictable: drug-induced QT prolongation and torsades de pointes. Journal of the American College of Cardiology.
https://www.jacc.org/doi/abs/10.1016/j.jacc.2015.12.063Thomas, S. H. L., & Behr, E. R. (2016). Pharmacological treatment of acquired QT prolongation and torsades de pointes. British journal of clinical pharmacology.
https://bpspubs.onlinelibrary.wiley.com/doi/abs/10.1111/bcp.12726Trinkley, K. E., Page, R. L., & Lien, H. (2013). QT interval prolongation and the risk of torsades de pointes: essentials for clinicians. Medical research and ….
https://www.tandfonline.com/doi/abs/10.1185/03007995.2013.840568