<unk>  is the major variant of long QT<unk> . It is a condition that causes a disruption of the heart's normal rhythm. This disorder is a form of long QT<unk> , which is a heart condition that causes the cardiac muscle to take longer than usual to recharge between beats. If untreated, the irregular heartbeats can lead to fainting, seizures, or sudden death.
Romano–Ward syndrome
Romano-Ward syndrome
Sohval-Soffer syndrome
Townes-Brocks syndrome
Fitzsimmons-Walson-Mellor syndrome
Lucey-Driscoll syndrome
Minkowski-Chauffard syndrome
Tome-Brune-Fardeau syndrome