Key result
Endocardial left ventricular pacing provides an effective alternative for patients who fail conventional cardiac resynchronization therapy, offering potentially superior hemodynamic response.
Why the study?
Between 30% and 50% of patients with dyssynchronous heart failure fail to improve after conventional CRT, or cannot have coronary sinus lead placement.
Does endocardial left ventricular pacing improve outcomes in patients with dyssynchronous heart failure who fail or are unsuitable for conventional CRT?
Does endocardial left ventricular pacing improve outcomes in patients with dyssynchronous heart failure who fail or are unsuitable for conventional CRT?
Endocardial LV pacing is a promising alternative for patients failing conventional CRT, offering unrestricted pacing site selection and improved hemodynamics, with leadless systems potentially overcoming the thromboembolic risks of lead-based approaches.
Answers are grounded in this paper and cite their sources.
Should not yet change CRT practice; leaves open need for randomized trials on safety and outcomes.
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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Elliott et al. (2021) conducted a review in Heart failure with electrical dyssynchrony. Endocardial left ventricular pacing vs. Conventional epicardial cardiac resynchronization therapy (CRT) was evaluated. Endocardial left ventricular pacing provides an effective alternative for patients who fail conventional cardiac resynchronization therapy, offering potentially superior hemodynamic response.
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