Conduction System Pacing Control for Ventricular Synchrony
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Solution Overview
Problem
Existing pacing therapies for patients with conduction system abnormalities fail to effectively improve electrical synchrony of the heart, leading to issues such as atrial fibrillation and heart failure, particularly when ventricular pacing is delivered via the right ventricle.
Innovation Solution
A medical device system that analyzes cardiac electrical signals to select and adjust VCS pacing therapies, including combinations of ventricular pacing sites like the His bundle, LBB, and RBB, adjusting pacing control parameters to optimize electrical synchrony by varying the number and timing of pacing pulses based on conduction conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ventricular pacing is delivered via the right ventricle apex, then the ventricular rate can be maintained in patients with AV conduction abnormalities, but electrical synchrony of the heart deteriorates leading to atrial fibrillation and heart failure
Solution Approach 1:
The patent divides the ventricular pacing function into multiple segments by utilizing different pacing sites (His bundle, bundle branches, Purkinje fibers) rather than relying on a single right ventricular apex site. This segmentation allows selective activation of ventricular regions to maintain electrical synchrony while ensuring reliable ventricular rate control.
Solution Approach 2:
The patent applies local quality by delivering pacing pulses to specific localized regions of the conduction system (His bundle, LBB, RBB) rather than diffuse right ventricular pacing. This targeted local stimulation preserves natural activation patterns and electrical synchrony in different ventricular regions.
2Device complexity
If a single ventricular pacing site is used, then the device complexity is reduced, but the effectiveness of improving electrical synchrony deteriorates
Solution Approach 1:
The patent makes the pacing system universal by designing it to function with multiple pacing sites (His bundle, LBB, RBB, Purkinje fibers) that can be selectively activated. The device can adaptively choose among different pacing configurations based on patient needs, providing multi-functional capability without proportionally increasing complexity.
Solution Approach 2:
The patent implements dynamics by allowing the pacing therapy to be adjusted and changed based on sensed cardiac electrical signals and determined conduction conditions. The system dynamically selects appropriate pacing sites and configurations rather than being fixed, optimizing electrical synchrony improvement while managing device complexity.
3Ease of operation
If pacing control parameters are fixed, then the ease of operation is improved, but the ability to optimize electrical synchrony under varying conduction conditions deteriorates
Solution Approach 1:
The patent implements feedback by continuously sensing cardiac electrical signals and using this information to determine ventricular conduction conditions. Based on this feedback, the system automatically adjusts pacing control parameters and selects appropriate pacing therapies, optimizing electrical synchrony without requiring manual reconfiguration by operators.
Solution Approach 2:
The patent enables self-service by designing the pacing system to automatically select and adjust pacing parameters based on sensed electrical signals and determined conduction conditions. The device serves itself by autonomously optimizing pacing therapy without external intervention, maintaining ease of operation while achieving reliable electrical synchrony optimization.
Data Source
AI summary
A medical device is configured to sense at least one cardiac electrical signal and generate pacing pulses according to a first pacing therapy by generating pacing pulses for delivery to a first combination of ventricular pacing sites including at least one ventricular conduction system pacing site. The medical device may be configured to determine a ventricular conduction condition based on a QRS signal feature of the sensed cardiac signal during the first pacing therapy. The medical device may change to a second pacing therapy different than the first pacing therapy based on the determined ventricular conduction condition.