Overview Long Term Prophylactic Therapy of Congenital Long QT Syndrome Type III (LQT3) With Ranolazine Status: Unknown status Trial end date: 2017-11-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine whether ranolazine will reduce the risk of arrhythmic events in patients with long QT syndrome type 3. Phase: Phase 2 Details Lead Sponsor: Tel-Aviv Sourasky Medical CenterTreatments: Ranolazine