Introduction
Complete left bundle branch block (CLBBB) is a severe cardiac conduction
disorder associated with hospitalization and cardiovascular
death.1 Atrial fibrillation (AF) is the most common
sustained tachyarrhythmia in clinical practice, which is associated with
an increased rate of stroke and heart failure.2CLBBB and AF are not uncommon
coexisted. It was found that the prevalence of left bundle branch block
(LBBB) in patients with AF was 1.7% and the prevalence of AF in the
LBBB population was 30.5%.3 Whether CLBBB and AF have
a synergistic effect on mortality and morbidity of the patients has not
been well determined.
Catheter ablation is a well-established therapy for patients with
symptomatic AF who were failed or intolerant to antiarrhythmic
drugs.4 It has been proved to be an effective option
to maintain sinus rhythm and improve the quality of life in patients
with AF.5 In a small sample size study, it was found
that LBBB was associated with very late recurrence in patients underwent
cryoballoon ablation of AF.6 However, the effect of
LBBB on long-term outcomes of catheter ablation of AF remains to be
further studied. This study aimed to explore the long-term prognosis of
patients with CLBBB who underwent catheter ablation of AF.
Methods