T-wave Oversensing and Symptomatic Bradycardia in a Pacemaker-Dependent Heart Failure Patient due to Drug-induced Hyperkalemia

Hyperkalemia is a common clinical condition among heart failure patients especially if there coexisting older age, potassium-sparing medication, and renal insufficiency. Close follow-up titration of renin-angiotensin-aldosterone system inhibitors are essential to prevent the development hyperkalemia. It can also cause significant abnormalities in with cardiac implantable electronic devices (CIED) including pacemakers cardioverter defibrillators (ICD) due its impact on electrophysiology. Herein, we presented pacemaker-dependent patient single-chamber ICD whom bradyarrhythmia signs symptoms were observed T-wave oversensing managed appropriately.