Long-term outcomes of His bundle pacing in patients with heart failure with left bundle branch block
Weijian Huang1,2, Lan Su1,2, Shengjie Wu1,2
1Department of Cardiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.
Insights
His bundle pacing (HBP) effectively corrects left bundle branch block (LBBB) in heart failure (HF) patients. This pacing method significantly improves heart function and reduces symptoms over the long term.
Area of Science:
- Cardiology
- Electrophysiology
- Heart Failure Management
Background:
- Left bundle branch block (LBBB) is a common conduction abnormality in heart failure (HF) patients.
- LBBB can worsen cardiac function and prognosis in HF.
- His bundle pacing (HBP) is an alternative pacing strategy that may correct LBBB.
Purpose of the Study:
- To evaluate the efficacy of HBP in correcting LBBB in HF patients.
- To assess the long-term clinical outcomes of HBP in this population.
Main Methods:
- Observational study of HF patients with typical LBBB indicated for pacing.
- Permanent HBP leads implanted based on correction thresholds.
- Assessment of pacing parameters, LVEF, LVESV, and NYHA Class during follow-up.
Main Results:
- HBP acutely corrected LBBB in 97.3% of patients.
- Permanent HBP was achieved in 75.7% of patients.
- At 3-year follow-up, patients with permanent HBP showed significant improvements in LVEF, LVESV, and NYHA Class.
Conclusions:
- Permanent His bundle pacing effectively corrects LBBB in heart failure patients.
- HBP leads to significant long-term improvements in cardiac function and clinical status.
Objectives:
His bundle pacing (HBP) can potentially correct left bundle branch block (LBBB). We aimed to assess the efficacy of HBP to correct LBBB and long-term clinical outcomes with HBP in patients with heart failure (HF).
Methods:
This is an observational study of patients with HF with typical LBBB who were indicated for pacing therapy and were consecutively enrolled from one centre. Permanent HBP leads were implanted if the LBBB correction threshold was <3.5V/0.5 ms or 3.0 V/1.0 ms. Pacing parameters, left ventricular ejection fraction (LVEF), left ventricular end-systolic volume (LVESV) and New York Heart Association (NYHA) Class were assessed during follow-up.
Results:
In 74 enrolled patients (69.6±9.2 years and 43 men), LBBB correction was acutely achieved in 72 (97.3%) patients, and 56 (75.7%) patients received permanent HBP (pHBP) while 18 patients did not receive permanent HBP (non-permanent HBP), due to no LBBB correction (n=2), high LBBB correction thresholds (n=10) and fixation failure (n=6). The median follow-up period of pHBP was 37.1 (range 15.0-48.7) months. Thirty patients with pHBP had completed 3-year follow-up, with LVEF increased from baseline 32.4±8.9% to 55.9±10.7% (p<0.001), LVESV decreased from a baseline of 137.9±64.1 mL to 52.4±32.6 mL (p<0.001) and NYHA Class improvement from baseline 2.73±0.58 to 1.03±0.18 (p<0.001). LBBB correction threshold remained stable with acute threshold of 2.13±1.19 V/0.5 ms to 2.29±0.92 V/0.5 ms at 3-year follow-up (p>0.05).
Conclusions:
pHBP improved LVEF, LVESV and NYHA Class in patients with HF with typical LBBB.
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