Cardiac Arrhythmia, Ankyrin-B-Related, also known as long qt syndrome 4, is related to sick sinus syndrome and cardiac conduction defect, and has symptoms including syncope An important gene associated with Cardiac Arrhythmia, Ankyrin-B-Related is ANK2 (Ankyrin 2), and among its related pathways/superpathways are G-Beta Gamma Signaling and Myometrial relaxation and contraction pathways. Affiliated tissues include heart and heart-ventricle, and related phenotypes are prolonged qt interval and syncope