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Electrogram signals recorded from acute and chronic pacemaker implantation sites in pacemaker patients
Pacing and Clinical Electrophysiology : PACE
|February 25, 1998
Summary
Subcutaneous electrode arrays (SEA) show promising pacemaker electrogram characteristics for device functions. These signals offer sufficient amplitude and quality for enhanced sensing and data storage in pacemakers.
Area of Science:
- Biomedical Engineering
- Cardiology
- Implantable Electronic Devices
Background:
- Electrogram signals from pacemaker sites are crucial for device functions like follow-up and sensing.
- Subcutaneous electrode arrays (SEA) offer a potential method for recording these electrograms.
Purpose of the Study:
- To quantify the electrical characteristics of pacemaker pocket electrograms recorded by a SEA.
- To assess the suitability of SEA electrograms for pacemaker system functions.
Main Methods:
- A subcutaneous electrode array (SEA) was used in 48 patients undergoing pacemaker implantation.
- Electrical characteristics including R wave, P wave amplitudes, and signal-to-noise ratios were measured.
- Comparisons were made between acute vs. chronic implantation and different pacing indications.
Main Results:
- SEA recorded intrinsic R wave amplitudes averaged 118 µV and 65 µV, and paced R waves averaged 180 µV and 110 µV.
- P wave amplitudes averaged 39 µV and 26 µV.
- Signal-to-noise ratios were lower (11 dB) than intracardiac electrograms (27 dB) but diagnostically sufficient, with a relative enhancement of P waves.
Conclusions:
- SEA electrograms possess adequate amplitude and signal quality for potential use in implantable pacemaker features.
- These findings suggest promise for electrogram telemetry, enhanced sensing, and diagnostic data storage using SEA technology.