Key result
Active inverse filters successfully compensate for ECG distortions, maintaining ST-segment deviations under 5 μV.
Why the study?
Mandatory analog RC filters in ECG devices cause distortions, requiring a compromise between noise immunity and waveform fidelity.
Population
Standard ECG signal ANE20000 and test rectangular and triangular pulses
Comparison
Active inverse high-pass and low-pass filters vs standard performance compliance limits
Design
Filter design and validation study
Authors
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May enable diagnostic ECG recovery from filtered signals; leaves open prospective clinical validation before practice adoption.
The proposed active inverse filters successfully compensate for distortions in RC-filtered ECGs, allowing for diagnostic-level recovery of ECG waveforms.
Dobrev et al. (2025) studied ECG distortions. Active inverse high-pass and low-pass filters was evaluated on Filter performance (low-frequency and high-frequency responses, ST-segment and peak deviations). Active inverse high-pass and low-pass filters successfully compensated for ECG distortions, maintaining ST-segment deviations <5 μV and peak amplitude deviations <±3.5%.
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