Hyperkalemia-induced pacemaker dysfunction

摘要

To the Editor, We read with great interest the article by Muck et al. The authors reported a very interesting case surviving extreme hyperka-lemia. We also recently had a case of hyperkalemia-induced pacemaker dysfunction manifested as failure of pacemaker capture and leading to unnecessary invasive pacemaker evaluation. An 86-year-old man with ischemic cardiomyopathy status post-implantable cardioverter-defibrillator implantation and complete atrioventricular block requiring permanent pacemaker with the rate-responsive accelerometer-based (DDDR) mode admitted for implantation of a left ventricular lead for cardiac resynchro-nization therapy. After the procedure, the patient subsequently developed failure to capture of the pacemaker stimulus with a wide idioventricular rhythm on 12-lead electrocardiography (ECG) (Fig. 1).