Key result
Dual-chamber PPM manages transient alternating RBBB and LBBB in a patient with cardiac amyloidosis.
Why the study?
Alternating bundle branch block is characterized by transient right and left bundle branch block, and its management highlights the complexities of treating conduction disease in patients with cardiac amyloid.
Case Report (n=1)
This case highlights the complexities of managing alternating bundle branch block and conduction disease with permanent pacing in patients with cardiac amyloidosis.
Supports permanent pacing for alternating bundle branch block in cardiac amyloid; extends conduction disease spectrum in infiltrative cardiomyopathy.
Alternating bundle branch block (ABBB) is a phenomenon described by the presence of both right bundle branch block (RBBB) and left bundle branch block (LBBB) in the same individual at different points in time. We present the case of a 74-year-old male with known cardiac amyloid who was managed in hospital for an ABBB in the context of an accidental fall. Serial electrocardiograms (ECGs) revealed transient alternating RBBB and LBBB. The patient underwent dual-chamber permanent pacemaker implantation. This case reviews the management of alternating bundle brunch blocks and highlights the complexities of treating conduction disease in patients with cardiac amyloid.
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Darshni et al. (2025) conducted a case report in Alternating bundle branch block and cardiac amyloidosis (n=1). Dual-chamber permanent pacemaker implantation was evaluated. Dual-chamber permanent pacemaker implantation was utilized to manage transient alternating right and left bundle branch block in a 74-year-old male with cardiac amyloidosis.
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