<unk>  is a very rare condition with, as of 2018, fewer than 300 cases described in the medical literature. As a genetic syndrome, those affected are born with the condition. Symptoms can occur in newborns, potentially presenting as sudden infant death syndrome. Males and females are equally likely to be affected, and have a similar risk of sudden cardiac death.
Short QT syndrome
Long QT syndrome
Opitz G/BBB syndrome
Brugada syndrome
Familial atrial fibrillation
Aicardi–Goutières syndrome
Phidippides cardiomyopathy
Pacak–Zhuang syndrome