Long Qt Syndrome 9, also known as lqt9, is related to hypokalemia and long qt syndrome 2. An important gene associated with Long Qt Syndrome 9 is CAV3 (Caveolin 3), and among its related pathways/superpathways are Transmission across Chemical Synapses and Cardiac conduction. Affiliated tissues include heart and heart-ventricle, and related phenotypes are prolonged qt interval and syncope