Why the study?
Spontaneous resolution of non-rate-dependent left bundle branch block has been rarely reported.
This case report provides in vivo documentation that spontaneous resolution and recurrence of LBBB directly correlate with the recovery and subsequent decline of left ventricular function, highlighting the mechanical impact of electrical dyssynchrony.
Transient LBBB resolution with LV recovery may occur but recur; leaves open durability, mechanisms, and predictors.
Spontaneous resolution of non-rate-dependent left bundle branch block (LBBB) has been rarely reported. We present the case of a 74-year-old woman admitted with pulmonary edema, a newly diagnosed LBBB and severe left ventricular (LV) dysfunction. Five months later, the patient was asymptomatic, the ECG recording showed complete regression of the LBBB to narrow QRS and LV function completely recovered. However, at one-year follow-up LBBB reappeared together with mild LV dysfunction. Spontaneous resolution of LBBB may be responsible for LV electrical and mechanical reverse remodeling in dyssynchronopathies.
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Moccia et al. (2019) studied this question.
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