Outcomes in Patients with Left Bundle Branch Block after Rapid Deployment Aortic Valve Replacement

Area of Science:

• Cardiology
• Cardiac Surgery
• Medical Devices

Background:

• Rapid deployment valves are associated with increased rates of new-onset left bundle branch block (LBBB) and permanent pacemaker implantation (PPI).
• The long-term impact of LBBB on patient outcomes after these procedures remains unclear.
• Existing data on LBBB after rapid deployment aortic valve replacement (RDAVR) are limited.

Purpose of the Study:

• To investigate the impact of new-onset LBBB on postoperative outcomes following RDAVR.
• To evaluate the association between LBBB and mortality and pacemaker implantation rates.
• To provide insights into the long-term clinical implications of LBBB in this patient population.

Main Methods:

• A cohort of 620 patients without pre-existing LBBB or PPI undergoing RDAVR was analyzed.
• New-onset LBBB was defined as persistent LBBB at hospital discharge.
• Clinical data were followed for a median of 1.7 years post-RDAVR.

Main Results:

• New-onset LBBB was observed in 17.5% of patients at discharge.
• No significant difference in all-cause mortality was found between patients with and without new-onset LBBB (12.8% vs. 11.7%) at 1.7-year follow-up.
• New-onset LBBB was significantly associated with higher pacemaker implantation rates during follow-up (10.1% vs. 6.3%).

Conclusions:

• New-onset LBBB after RDAVR is not associated with increased long-term mortality.
• Patients developing new-onset LBBB require closer monitoring due to a significantly higher likelihood of pacemaker implantation.
• These findings highlight the importance of understanding LBBB sequelae in RDAVR procedures.