Atrial fibrillation (AF) coexists frequently with heart failure (HF). Permanent His-bundle pacing (pHBP) seems to be an optimal approach to the management of patients with HF and concomitant AF, which are the indication for single chamber ICD implantation. This management allows to up-titrate the beta-blocker dose in order to prevent tachyarrhythmia with no risk of bradyarrhythmia or triggering deleterious right ventricular pacing. We present a case of 69-years-old male with AF, worsening HF and high burden of RV pacing. The upgrade from single chamber ICD to dual chamber ICD with pHBP alleviated the symptoms and contributed to substantial echocardiographic improvement.
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