Long QT syndrome


Long QT syndrome can be inherited or caused by a medication or condition. It often goes undiagnosed or is misdiagnosed as a seizure disorder, such as epilepsy.


Heartbeats can be so fast and for so long that they trigger a sudden fainting spell, seizure, or even sudden death.


Treatment can involve medical devices, surgery, lifestyle changes, or medications, such as beta blockers.

Last Updated Jun 13, 2017

© 2023 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved. Terms of Use