Long QT Syndrome (LQTS) is a genetic condition that affects the heart's electrical activity. It can cause fast, chaotic heartbeats, which may lead to sudden fainting, seizures, or even sudden death. The "QT" refers to a measurement on an electrocardiogram (ECG) that indicates the time it takes for the heart's electrical system to recharge between beats. In patients with LQTS, this interval is prolonged.
