Endocardial left ventricular pacing
Mark K Elliott1,2, Vishal S Mehta3, Baldeep Singh Sidhu3,4
1School of Biomedical Engineering and Imaging Sciences, St Thomas' Hospital, King's College London, SE1 7EH, London, UK. mark.elliott@kcl.ac.uk.
Insights
Endocardial left ventricular (LV) pacing offers a promising alternative for heart failure patients unresponsive to cardiac resynchronization therapy (CRT). This approach may provide superior electrical and hemodynamic benefits compared to conventional CRT.
Area of Science:
- Cardiology
- Biomedical Engineering
Background:
- Cardiac resynchronization therapy (CRT) is a standard treatment for heart failure with dyssynchrony.
- A significant percentage of patients (30-50%) do not respond to conventional CRT.
Purpose of the Study:
- To explore endocardial left ventricular (LV) pacing as an alternative to conventional CRT.
- To compare the advantages and disadvantages of endocardial LV pacing with traditional CRT.
- To review current evidence and future directions for endocardial LV pacing systems.
Main Methods:
- Review of existing literature on endocardial LV pacing.
- Comparison of electrical resynchronization and hemodynamic response data.
- Discussion of lead-based and leadless endocardial pacing systems.
Main Results:
- Endocardial LV pacing provides pacing flexibility, overcoming limitations of coronary sinus anatomy.
- Evidence suggests superior electrical resynchronization and hemodynamic response compared to epicardial CRT.
- Both lead-based and leadless systems are viable for endocardial LV pacing delivery.
Conclusions:
- Endocardial LV pacing is a viable alternative for non-responders to CRT or patients with challenging anatomy.
- This technology offers potential for improved patient outcomes in heart failure management.
- Further research into novel endocardial pacing systems is warranted.
Abstract:
Cardiac resynchronization therapy (CRT) is an effective treatment for dyssynchronous heart failure; however, 30-50% of patients fail to improve after implant. Endocardial left ventricular (LV) pacing is an alternative therapy for patients who do not respond to conventional CRT or in whom placement of a lead via the coronary sinus is not possible. It enables pacing at a wide variety of sites, without restrictions due to coronary sinus anatomy, and there is evidence of superior electrical resynchronization and hemodynamic response compared with conventional epicardial CRT. In this article, we discuss the potential advantages and disadvantages of endocardial LV pacing compared with conventional CRT, review the evidence for the delivery of endocardial LV pacing using both lead-based and leadless systems, and explore possible future directions of this novel technology.
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