Implantable Device Far-Field ECG Telemetry
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Solution Overview
Problem
Current methods for obtaining ECG data require the use of surface electrodes, which are inconvenient and often result in poor signal quality, especially during remote patient monitoring sessions.
Innovation Solution
The use of far-field sensing electrodes integrated into implantable medical devices (IMDs) to acquire ECG signals, eliminating the need for external electrodes and allowing for direct transmission of cardiac electrical signals to an external monitor or programmer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If surface ECG electrodes are used for remote patient monitoring, then ECG data can be collected, but the patient burden increases and signal quality deteriorates
Solution Approach 1:
The patent extracts the ECG sensing function from external surface electrodes and relocates it to the implantable medical device itself. The IMD's existing electrodes, originally intended for pacing and sensing, are repurposed to capture ECG signals directly at the heart, eliminating the need for external electrode application by the patient.
Solution Approach 2:
The implantable medical device performs self-sensing of ECG signals using its own implanted electrodes. The device automatically captures cardiac electrical activity without requiring patient intervention for electrode placement, thereby reducing patient burden while maintaining high signal quality through direct cardiac contact.
2Loss of information
If surface ECG electrodes are applied during clinic visits, then ECG tracings can be obtained, but the preparation time and procedural complexity increase
Solution Approach 1:
The ECG sensing capability is pre-installed within the implantable medical device during the initial implantation procedure. This preliminary action ensures that ECG data collection functionality is already in place and requires no additional preparation or electrode application during subsequent clinic visits or remote monitoring sessions.
Solution Approach 2:
The implantable medical device is designed with multi-functionality, serving both its primary therapeutic function (pacing/defibrillation) and ECG monitoring function through the same implanted electrodes. This universal design eliminates the need for separate ECG monitoring equipment and electrode application, reducing both time and procedural complexity.
3Ease of operation
If transtelephonic monitoring with wrist electrodes is used, then remote follow-up is convenient, but ECG signal quality becomes poor
Solution Approach 1:
The implantable medical device acts as an intermediary between the patient's heart and the external monitoring system. It captures high-quality ECG signals directly at the cardiac source and transmits them wirelessly to external monitors, eliminating the need for poor-quality surface electrode measurements while maintaining remote monitoring convenience.
Data Source
AI summary
A method for use in an implantable medical device system, comprising: selecting a first sensing electrode operatively disposed in a first heart chamber; setting a first sensing window corresponding to cardiac electrical events occurring in a second heart chamber; enabling a first sense amplifier coupled to the first sensing electrode during the first sensing window; sensing a first signal corresponding to cardiac electrical events occurring in the second heart chamber during the first sensing window using the first sensing electrode; and transmitting the first signal from an implantable medical device to an external monitor.