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R-wave detection by subcutaneous ECG. Possible use for analyzing R-R variability
1Medical Clinic I, Charité Hospital, Schumannstr. 20-21, 10089 Berlin, Germany. parwis.fotuhi@charite.de
Summary
Subcutaneous far-field ECG (SFFECG) effectively detects R-waves, enabling accurate R-R variability analysis for atrial arrhythmia detection in cardiac devices.
Area of Science:
- Biomedical Engineering
- Cardiology
- Medical Devices
Background:
- Atrial arrhythmia (AA) detection is challenging for current implantable cardiac devices.
- Accurate discrimination of AA requires reliable R-wave detection and analysis.
Purpose of the Study:
- To assess the feasibility of using subcutaneous far-field ECG (SFFECG) for R-wave detection.
- To evaluate SFFECG for R-R interval variability analysis as a marker for AA.
Main Methods:
- Surface ECG and SFFECG were recorded from 16 patients with AA.
- SFFECG utilized a four-electrode array placed in the pacemaker pocket.
- R-wave amplitude and R-R interval variability were analyzed from SFFECG signals.
Main Results:
- R-waves were discernible in all SFFECG recordings.
- Automatic R-wave recognition via SFFECG showed 3% over-detection and 9% under-detection.
- SFFECG-derived R-R variability analysis was concordant with surface ECG results.
Conclusions:
- SFFECG is feasible for R-wave detection in implantable devices.
- SFFECG can be utilized for R-R variability measurement, aiding AA detection.