Key result
The incidence of left bundle branch block in ambulatory patients with chronic heart failure is 10.9% in the first year, significantly impacting prognosis (HR 2.09).
In ambulatory patients with chronic heart failure, the incidence of new LBBB is approximately 11% in the first year and is independently associated with a worse prognosis, highlighting the need for regular ECG monitoring.
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May support closer ECG surveillance in ambulatory HF; extends observational associations but leaves causal impact open for prospective trials.
Clark et al. (2008) studied this question. The incidence of left bundle branch block in ambulatory patients with chronic heart failure is 10.9% in the first year, significantly impacting prognosis (HR 2.09).
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