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Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

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Long QT Syndrome history and symptoms

Introduction

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Overview

Overview

Patients with long QT syndrome may have a positive history of family history of syncope, seizures, cardiac arrest or first-degree relatives with known long QT syndrome. Symptoms of long QT syndrome include lightheadedness, palpitations, syncope or presyncope or seizure.

History and Symptoms

History and Symptoms

History

Patients with long QT syndrome may have a positive history of:[1]

  • Prior history of cardiac arrest
  • Family history of syncope, seizures or cardiac arrest
  • First-degree relatives with known long QT syndrome
  • Using certain medications causing prolonged QT interval

Common Symptoms

Common symptoms of long QT syndrome include:[2][3]

Less common symptoms

Less common symptoms of long QT syndrome include:

References

References

  1. ↑ Horigome H, Nagashima M, Sumitomo N, Yoshinaga M, Ushinohama H, Iwamoto M, Shiono J, Ichihashi K, Hasegawa S, Yoshikawa T, Matsunaga T, Goto H, Waki K, Arima M, Takasugi H, Tanaka Y, Tauchi N, Ikoma M, Inamura N, Takahashi H, Shimizu W, Horie M (February 2010). “Clinical characteristics and genetic background of congenital long-QT syndrome diagnosed in fetal, neonatal, and infantile life: a nationwide questionnaire survey in Japan”. Circ Arrhythm Electrophysiol. 3 (1): 10–7. doi:10.1161/CIRCEP.109.882159. PMID 19996378.
  2. ↑ Schwartz PJ, Crotti L, Insolia R (August 2012). “Long-QT syndrome: from genetics to management”. Circ Arrhythm Electrophysiol. 5 (4): 868–77. doi:10.1161/CIRCEP.111.962019. PMC 3461497. PMID 22895603.
  3. ↑ Vincent GM (October 2002). “The long QT syndrome”. Indian Pacing Electrophysiol J. 2 (4): 127–42. PMC 1557415. PMID 16951729.