Long Qt Syndrome 13, also known as lqt13, is related to familial long qt syndrome and long qt syndrome. An important gene associated with Long Qt Syndrome 13 is KCNJ5 (Potassium Inwardly Rectifying Channel Subfamily J Member 5), and among its related pathways/superpathways are Cardiac conduction and G-Beta Gamma Signaling. Affiliated tissues include heart and heart-atrium, and related phenotypes are palpitations and syncope