Cardiac Pacing Electrode Selection for Hemodynamic Synchronization
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Solution Overview
Problem
Current cardiac pacing therapies face challenges in optimizing electrode selection and pacing configurations to effectively synchronize heart chamber contractions, particularly in patients with congestive heart failure, where unsynchronized ventricular contractions lead to diminished cardiac output.
Innovation Solution
A method and system for detecting changes in hemodynamic states, such as heart rate or cardiac dysynchrony, to determine the distribution of electrical, mechanical, or electromechanical parameters within the heart chamber, allowing for the selection of optimal electrode configurations and pacing output sequences to enhance cardiac contractile function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If standard pacing configurations are used, then the device complexity is reduced, but the cardiac pumping efficiency deteriorates due to unsynchronized contractions
Solution Approach 1:
The system automatically adjusts pacing parameters including electrode selection, pulse amplitude, pulse width, and timing intervals based on detected hemodynamic state changes. This dynamic parameter optimization enables synchronized contractions and improved pumping efficiency without requiring complex manual configuration by clinicians.
Solution Approach 2:
The pacing system performs self-optimization by automatically detecting hemodynamic changes and adjusting its own pacing configuration parameters. The device selects optimal electrode combinations and timing sequences autonomously, eliminating the need for complex external programming while maintaining synchronized cardiac function.
2Adaptability or versatility
If fixed pacing configurations are used, then the ease of operation is improved, but the adaptability to changing patient conditions deteriorates
Solution Approach 1:
The pacing system transitions from static fixed configurations to dynamic adaptive configurations that automatically adjust to changing hemodynamic conditions. The device continuously monitors parameters such as heart rate, blood pressure, and oxygen saturation, and modifies pacing electrode selection and timing sequences in real-time to maintain optimal cardiac synchronization across varying patient states.
Solution Approach 2:
The system incorporates continuous feedback loops where hemodynamic sensors monitor patient condition and feed this information back to the pacing control algorithm. This closed-loop control enables automatic adaptation of pacing parameters to maintain synchronized contractions during transitions between rest, exercise, and other physiological states without requiring manual reprogramming.
3Productivity
If multiple electrodes are used for optimization, then the cardiac contractile function is enhanced, but the device complexity increases
Solution Approach 1:
The system divides the cardiac chamber into multiple segments or regions, each monitored by dedicated electrodes. By segmenting the pacing approach, the device can selectively activate specific electrode groups corresponding to different myocardial regions, enabling precise control of contraction sequences while simplifying the overall control logic through modular electrode management.
Solution Approach 2:
The pacing system applies local quality optimization by selecting specific electrodes based on their spatial location and the local electrical and mechanical properties of the myocardium. Different electrodes are activated based on their ability to capture specific myocardial regions, allowing tailored pacing strategies for different areas of the heart to enhance overall contractile function without requiring all electrodes to be actively managed simultaneously.
Data Source
AI summary
Systems and methods for selection of electrodes and related pacing configuration parameters used to pace a heart chamber are described. A change in the hemodynamic state of a patient is detected. Responsive to the detected change, a distribution of an electrical, mechanical, or electromechanical parameter related to contractile function of a heart chamber with respect to locations of multiple electrodes disposed within the heart chamber is determined. A pacing output configuration, including one or more electrodes of the multiple electrodes, is selected and the heart chamber is paced using the selected pacing output configuration.