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Ann Noninvasive Electrocardiol. 2019 Apr 2:e12644. doi: 10.1111/anec.12644. [Epub ahead of print]

Re-evaluating the electro-vectorcardiographic criteria for left bundle branch block.

Author information

1
Study Design and Scientific Writing Laboratory, ABC Faculty of Medicine, Santo André, São Paulo, Brazil.
2
Coronary Center, de Messejana Hospital Dr. Carlos Alberto Studart Gomes, Fortaleza, Ceará, Brazil.
3
IInstitute of Biology-Genetics and Morphology, University of Brasília, Brasília, Federal District, Brazil.
4
Heart Center, Tampere University Hospital and Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland.
5
Soler Clinic, São Paulo, Brazil.

Abstract

The criteria for left bundle branch block have gained growing interest in the last few years. In this overview, we discuss diagnostic and prognostic aspects of different criteria. It was already shown that stricter criteria, including longer QRS duration and slurring/notching of the QRS, better identify responders to cardiac resynchronization therapy. We also include aspects of ST/T concordance and discordance and vectorcardiography, which could further improve in the fine-tuning of the left bundle branch criteria.

KEYWORDS:

QRS duration; QRS notched/slurred R waves in lateral leads; cardiac resynchronization therapy; concordant and appropriate discordance; left bundle branch block

PMID:
30938470
DOI:
10.1111/anec.12644

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