His bundle pacing with unusual automaticity.

The article presents a case of a 76-year-old female who underwent pacemaker implantation for His bundle pacing and experienced palpitation following the procedure. She is suffering from frequent syncope because of temporal complete atrioventricular (AV) block. Her electrocardiography showed accelerated junctional rhythm. After one month, her accelerated junctional rhythm dissipated and her palpitation was suppressed.