Key result
Stricter criteria for left bundle branch block, including longer QRS duration and slurring/notching, better identify responders to cardiac resynchronization therapy.
Why the study?
Criteria for left bundle branch block have gained growing interest, with a need to discuss diagnostic and prognostic aspects and refine these criteria using electro-vectorcardiographic features.
How do different electro-vectorcardiographic criteria for left bundle branch block affect the identification of responders to cardiac resynchronization therapy?
How do different electro-vectorcardiographic criteria for left bundle branch block affect the identification of responders to cardiac resynchronization therapy?
Stricter ECG criteria and vectorcardiography may improve the selection of patients with left bundle branch block who will respond to cardiac resynchronization therapy.
Stricter LBBB criteria may refine CRT selection; leaves open confirmation of outcome benefit in prospective trials.
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.
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Pérez‐Riera et al. (2019) conducted a review in Left bundle branch block. Electro-vectorcardiographic criteria was evaluated. Stricter criteria for left bundle branch block, including longer QRS duration and slurring/notching, better identify responders to cardiac resynchronization therapy.
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