Conduction Disorders after Rapid Deployment Aortic Valve Replacement Compared to Conventional Aortic Valve...

Area of Science:

• Cardiology
• Cardiac Surgery
• Medical Devices

Background:

• Aortic valve replacement (AVR) is a common procedure for severe aortic valve disease.
• Rapid deployment aortic valve replacement (RDAVR) offers a potentially faster surgical option.
• Understanding the long-term conduction system effects of RDAVR compared to conventional AVR is crucial.

Purpose of the Study:

• To compare the incidence and evolution of atrioventricular and intraventricular conduction disorders after RDAVR versus conventional AVR.
• To assess early postprocedural and midterm outcomes, including pacemaker implantation and mortality.

Main Methods:

• Retrospective analysis of 147 patients undergoing RDAVR and 128 patients undergoing conventional AVR.
• ECGs were analyzed at baseline, discharge, and 12 months post-procedure.
• Key parameters evaluated included PQ interval, QRS duration, and development of conduction disorders like LBBB.

Main Results:

• RDAVR group showed a significant increase in mean QRS width at discharge (p < 0.001) compared to baseline.
• Higher incidence of left bundle branch block (LBBB) at 12 months in the RDAVR group (19.3% vs. 5.1%, p < 0.001).
• Significantly higher rates of permanent pacemaker implantation (PPI) in the RDAVR group (HR: 4.68, p < 0.001).

Conclusions:

• RDAVR is associated with a higher incidence of LBBB and increased need for PPI at 12 months post-procedure.
• No significant difference in 12-month mortality was observed between RDAVR and conventional AVR groups.
• Careful monitoring for conduction disturbances is warranted following RDAVR.