Abstract
The specific criteria for left bundle branch pacing (LBBP) include right bundle branch delay (RBBD) pattern (qR/Qr/rSRʹ) in lead V1 and transition from nonselective to selective left bundle branch (LBB)– or left ventricular septal (LVS)–only capture at near-threshold outputs.1 An absent RBBD pattern during deep septal pacing would generally indicate that the pacing lead has not reached the LBB/LVS and requires additional rotations. Rarely the qR/Qr/rSRʹ pattern in lead V1 may be masked (QS pattern) despite LBBP (Figures 1A and 1B, blue circles).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
