Related Experiment Video
Updated: Jun 9, 2026
Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
Published on: December 11, 2017
Transesophageal echocardiography versus fluoroscopy-guided left bundle branch area pacing: a comparative study
Gabriel Odozynski1,2, Clóvis Froemming3, Thiago Viçoso Dos Santos3
1Harvard-Thorndike Electrophysiology Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, 185 Pilgrim Road, Baker Building, 4th, Boston, MA, 02215, USA. cardio.gabriel@gmail.com.
Transesophageal echocardiography (TEE) guidance significantly improves Left Bundle Branch Area Pacing (LBBAP) implantation efficiency and electrical outcomes. This TEE approach offers a more effective method for conduction system pacing compared to traditional fluoroscopy.
Area of Science:
- Cardiology
- Electrophysiology
- Medical Imaging
Background:
- Conduction System Pacing (CSP), especially Left Bundle Branch Area Pacing (LBBAP), offers a physiological alternative to conventional ventricular pacing.
- Optimal lead placement for LBBAP remains a procedural challenge.
Purpose of the Study:
- To evaluate if intraprocedural transesophageal echocardiography (TEE) can enhance Left Bundle Branch Area Pacing (LBBAP) implantation.
- To compare TEE-guided LBBAP with conventional fluoroscopy-guided approaches regarding procedural efficiency, lead positioning, and electrical outcomes.
Main Methods:
- A retrospective, non-randomized cohort study of 405 patients undergoing LBBAP.
- Comparison between a fluoroscopy-only group (198 patients) and a TEE-guided group (207 patients).
- Primary endpoints included procedure time, fluoroscopy time, QRS duration, R-wave peak time, and lead impedance.
Main Results:
- TEE-guided LBBAP showed significantly shorter procedure and fluoroscopy times.
- Narrower post-procedural QRS duration was observed in the TEE group, particularly in patients with baseline wide QRS.
- Lower lead impedance was achieved with TEE guidance, while pacing thresholds and R-wave amplitudes were comparable. Complication rates were low and similar between groups.
Conclusions:
- TEE-guided LBBAP implantation enhances procedural efficiency and achieves adequate cardiac electrical resynchronization.
- The integration of TEE into conduction system pacing protocols merits further investigation in randomized controlled trials.
