Long QT Syndrome 3

**Semantic type:** Disease or Syndrome

**Definition:** An autosomal dominant condition caused by mutation(s) in the SCN5A gene, encoding sodium channel protein type 5 subunit alpha. It is characterized by a prolonged QT interval that may result in torsade de pointes, ventricular fibrillation and/or sudden cardiac death.

**Synonyms:** - LQT3