Chronic kidney disease (CKD) patients are at increased risk for ventricular arrhythmia and sudden cardiac death (SCD). The rate of SCD in CKD patients increased as glomerular filtration rate decreased. Sudden cardiac death is generally mediated by ventricular arrhythmias associated with instability of myocardial repolarization. QT variability index (QTVI) as an index of myocardial repolarizatio…