Inclusion Criteria:  Patients with diabetes:  Type 1 diabetes or Type 2 diabetes diagnosed according to the criteria of the World Health Organization Ongoing glucose-lowering treatment Receiving chronic hemodialysis for more than 3 months Age ≥ 18 years  Patients without diabetes:  HbA1c < 48 mmol/mol Receiving chronic hemodialysis for more than 3 months Age ≥ 18 years  Exclusion Criteria:  For both groups:  Already treated with pacemaker or implantable cardioverter defibrillator (ICD) Permanent (chronic) atrial fibrillation Previously diagnosed sustained (> 30 seconds) ventricular tachycardia (more than 200 bpm) or ventricular fibrillation (note that ventricular premature beats is not considered an exclusion), or known cardiac ion-channel diseases (such as Long QT syndrome and Brugada syndrome) Previously complications in relation to wearing a CGM sensor, e.g. allergic reaction Inability to give written informed consent