Diseases and Conditions

Long QT syndrome


Long QT syndrome (LQTS) is a heart rhythm condition that can potentially cause fast, chaotic heartbeats. These rapid heartbeats might trigger a sudden fainting spell or seizure. In some cases, the heart can beat erratically for so long that it causes sudden death.

You can be born with a genetic mutation that puts you at risk of long QT syndrome. In addition, certain medications and medical conditions might cause long QT syndrome.

Long QT syndrome is treatable. You might need to take medications to prevent a chaotic heart rhythm. In some cases, treatment for long QT syndrome involves surgery or an implantable device. You'll also need to avoid medications known to cause prolonged QT intervals that could trigger your long QT syndrome. Sometimes, certain physical activities or sports may need to be avoided.