Long Qt Syndrome 6, also known as lqt6, is related to atrial fibrillation, familial, 4 and gingival fibromatosis, and has symptoms including syncope An important gene associated with Long Qt Syndrome 6 is KCNE2 (Potassium Voltage-Gated Channel Subfamily E Regulatory Subunit 2), and among its related pathways/superpathways are Cardiac conduction and Dopamine-DARPP32 Feedback onto cAMP Pathway. Affiliated tissues include heart and heart-ventricle, and related phenotypes are prolonged qtc interval and cardiac arrest