Synchronizing Dual Cardiac Pacemaker Pacing Rates
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Solution Overview
Problem
Existing rate responsive cardiac pacemakers implanted in patients often operate at different pacing rates, leading to potential discomfort and negative medical outcomes due to asynchronous adjustments based on activity levels.
Innovation Solution
A medical device system that synchronizes the pacing rates of multiple pacemakers using a computing device to receive and match rate responsive pacing data, ensuring that both pacemakers perform cardiac pacing at similar rates by modifying activity sensor parameters and rate response slopes during triggered exercise tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple rate responsive pacemakers are implanted to perform cardiac pacing for respective chambers, then cardiac pacing coverage is improved, but pacing rate synchronization deteriorates leading to patient discomfort
Solution Approach 1:
The system uses feedback by having each pacemaker transmit its sensed activity level and pacing rate to a external device, which then calculates adjustment factors and transmits them back to the pacemakers. This closed-loop feedback mechanism enables the pacemakers to synchronize their pacing rates while maintaining their individual rate responsive functionality, resolving the contradiction between improved pacing coverage and deteriorated rate synchronization.
Solution Approach 2:
An external device acts as an intermediary between multiple pacemakers, receiving data from each pacemaker, calculating synchronization parameters, and transmitting adjustment factors back to the pacemakers. This intermediary coordinates the pacing rates of multiple pacemakers without requiring direct communication between them, enabling reliable rate synchronization while preserving the benefits of multiple pacemaker implantation.
2Ease of operation
If each pacemaker independently adjusts pacing rate based on its own activity detection, then rate responsive functionality is maintained, but pacing rate consistency deteriorates
Solution Approach 1:
The system maintains rate responsive functionality by allowing each pacemaker to continue using its own activity sensors and rate response algorithms. However, it introduces a synchronization parameter (adjustment factor) that modifies the final pacing rate output. This parameter change enables each pacemaker to operate independently for rate responsiveness while achieving consistency through the applied adjustment factor, resolving the contradiction between ease of operation and pacing rate consistency.
3Device complexity
If pacemakers operate autonomously without coordination, then device complexity is reduced, but patient comfort deteriorates due to asynchronous pacing
Solution Approach 1:
The system segments the pacemaker coordination function into two parts: each pacemaker independently performs activity sensing and rate calculation, while a separate external device handles the synchronization coordination. This segmentation reduces the complexity burden on the implanted pacemakers themselves while still achieving the goal of reducing patient discomfort through synchronized pacing rates.
Data Source
AI summary
A computing device may be communicably coupled to a first pacemaker implanted in a heart of a patient and a second pacemaker implanted in the heart of the patient. The computing device may receive, from the first pacemaker, first race responsive pacing data, and may receive, from the second pacemaker, second rate responsive pacing data. The computing device may synchronize, based at least in part on the first rate responsive pacing data and the second rate responsive pacing data, rate responsive pacing of the first pacemaker and the second pacemaker.