Researchers conducted a randomized clinical trial involving 200 patients across six centers in China. These patients had heart failure and a condition called left bundle-branch block (LBBB), with a severely reduced pumping function of the heart. The team compared two types of pacemaker settings: left bundle-branch pacing (LBBP) and biventricular pacing (BiVP). The primary goal was to see which method better prevented death or hospitalization for heart failure over time.
The results showed that patients receiving LBBP had a much lower risk of the primary outcome compared to those with BiVP. Specifically, only 8% of the LBBP group experienced death or hospitalization versus 28% in the BiVP group. The risk of heart failure hospitalization was also significantly lower with LBBP. While the difference in overall death rates was not statistically significant, the reduction in hospitalizations was clear.
Safety data were not reported in this study, so long-term side effects remain unknown. Readers should understand that this evidence comes from a single region and further trials are needed to confirm these findings in other populations. This study suggests LBBP may be a superior option for this specific group, but it does not replace standard medical advice.