Transient RBBB and Temporary LBBB Following Transcatheter Aortic Valve Replacement.

Area of Science:

• Cardiology
• Interventional Cardiology
• Cardiac Electrophysiology

Background:

• Conduction disturbances are common post-transcatheter aortic valve replacement (TAVR), most frequently presenting as left bundle branch block (LBBB).
• Sequential right bundle branch block (RBBB) followed by LBBB is an exceptionally rare complication after TAVR.

Purpose of the Study:

• To report a rare case of transient RBBB followed by persistent LBBB after TAVR.
• To highlight the potential significance of RBBB as a precursor to LBBB in the post-TAVR setting.

Main Methods:

• Case report of an 82-year-old female patient.
• Clinical observation of cardiac conduction abnormalities following TAVR.

Main Results:

• The patient developed transient RBBB one hour post-TAVR.
• Persistent LBBB emerged one day after the procedure.
• Both RBBB and LBBB resolved completely by the one-month follow-up.

Conclusions:

• New-onset RBBB following TAVR should be recognized as a potential harbinger of subsequent LBBB.
• Extended monitoring and consideration for prolonged temporary pacemaker implantation in patients with post-TAVR RBBB are clinically prudent strategies.