Question:
Why a Left Bundle Branch Area Pacing (LBBAP) is better than a bicameral LP for a 71 years old healthy patient with second degree AV Block and nocturnal non capture issues with a current unicameral LP?
Answer:
In a 71-year-old otherwise healthy patient with second-degree AV block and nocturnal non-capture issues on a unicameral leadless pacemaker (LP),
Left Bundle Branch Area Pacing (LBBAP) provides several advantages over a bicameral leadless pacemaker:
- Physiological pacing: LBBAP directly stimulates the conduction system, preserving synchronous ventricular activation, which reduces the risk of pacing-induced cardiomyopathy compared to right ventricular pacing.
- Reliability in AV block: Because the block is at the AV node/His level, conduction system pacing (like LBBAP) ensures stable ventricular capture, which is crucial in patients with unreliable nocturnal capture.
- Proven performance in nocturnal settings: LBBAP thresholds are typically stable and less influenced by circadian autonomic variations, which may reduce the likelihood of nocturnal non-capture compared to current leadless systems.
- Future-proofing: While bicameral leadless pacemakers offer atrial sensing and ventricular pacing, they still rely on leadless technology that may have threshold instability. LBBAP aligns better with long-term outcomes in younger, healthier seniors.
- Hemodynamic benefit: By maintaining near-normal ventricular synchrony, LBBAP optimizes cardiac output, which can be especially important during sleep when perfusion pressures drop.
In summary, for this patient profile, LBBAP provides a more physiological, stable, and reliable pacing strategy than a bicameral leadless pacemaker, particularly in the context of nocturnal non-capture.