Long Qt Syndrome 3, also known as lqt3, is related to long qt syndrome 6 and brugada syndrome 1, and has symptoms including syncope An important gene associated with Long Qt Syndrome 3 is SCN5A (Sodium Voltage-Gated Channel Alpha Subunit 5), and among its related pathways/superpathways are Activation of cAMP-Dependent PKA and Cardiac conduction. The drugs Ranolazine and Diuretics, Potassium Sparing have been mentioned in the context of this disorder. Affiliated tissues include heart and endothelial, and related phenotypes are hydrops fetalis and ventricular tachycardia