Bilateral Bundle Branch Block

Jasen L Gilge; Benzy J Padanilam

doi:10.1016/j.ccep.2021.06.008

Bilateral Bundle Branch Block

Card Electrophysiol Clin. 2021 Dec;13(4):685-689. doi: 10.1016/j.ccep.2021.06.008. Epub 2021 Sep 23.

Authors

Jasen L Gilge¹, Benzy J Padanilam²

Affiliations

¹ St Vincent Hospital, 8333 Naab Road, Suite 400, Indianapolis, IN 46260, USA. Electronic address: Jasen.gilge@ascension.org.
² St Vincent Hospital, 8333 Naab Road, Suite 400, Indianapolis, IN 46260, USA.

PMID: 34689895
DOI: 10.1016/j.ccep.2021.06.008

Abstract

Left bundle branch block (LBBB) and right bundle branch block (RBBB) are classic manifestations of bundle branch conduction disorders. However, a third form that is uncommon and underrecognized may exist that has features and pathophysiology of both: bilateral bundle branch block (BBBB). This unusual form of bundle branch block exhibits an RBBB pattern in lead V1 (terminal R wave) and an LBBB pattern in leads I and aVL (absence of S wave). This unique conduction disorder may confer an increased risk of adverse cardiovascular events. BBBB patients may be a subset of patients that respond well to cardiac resynchronization therapy.

Keywords: Bilateral bundle branch block; Bundle branch block; Conduction system disorder; Left bundle branch block; Right bundle branch block.

Publication types

Review

MeSH terms

Bundle-Branch Block* / therapy
Cardiac Conduction System Disease
Cardiac Resynchronization Therapy*
Electrocardiography
Heart Conduction System
Humans