ECG leads achieved an SNRbase of 6.00 ±3.04 dB during quiet breathing, demonstrating their potential for monitoring respiratory muscle activity without compromising cardiac signals.
Do standard ECG leads provide adequate signal-to-noise ratios for monitoring respiratory surface EMG compared to dedicated chest electrodes in healthy subjects?
20 healthy subjects, mean age 26.7±3.33 years, BMI 24.00±2.91 kg/m2
Standard 12-lead ECG leads (Einthoven and Wilson) and differential leads combining one ECG electrode with one chest electrode
Reference differential lead between LMCL3 and RMCL3
Signal-to-noise ratios (SNRbase and SNRexp) between inspiratory activity and baseline noise or expiratory activitysurrogate
Standard ECG leads can be repurposed to monitor respiratory muscle activity, with performance enhanced by adding a single respiratory sEMG electrode, facilitating integrated cardiopulmonary monitoring.
Surface electromyography (sEMG) offers potential for analyzing patient-ventilator interactions and respiratory effort. Despite promising in monitoring respiration, it is not clinically established, unlike electrocardiography (ECG), which shares the same physiological principle for cardiac monitoring. This study investigates ECG leads for respiratory monitoring in 20 subjects performing quiet and resistance breathing. Performance was quantified by signal-to-noise ratios between inspiratory activity and (1) baseline noise and (2) expiratory activity. ECG leads were suitable for monitoring respiration, with performance enhanced by combining ECG electrodes with sEMG electrodes. The findings support integrating respiratory sEMG into clinical practice using ECG electrodes without compromising cardiac monitoring.
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Andra Oltmann
Jan Graßhoff
Nils Lange
Universität Hamburg
University Medical Center Hamburg-Eppendorf
Fraunhofer Research Institution for Individualized and Cell-Based Medical Engineering
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Oltmann et al. (Tue,) conducted a other in Respiratory muscle activity measurement (n=20). ECG leads for measuring respiratory sEMG vs. Standard electrode leads was evaluated on Signal-to-noise ratio (SNR) for inspiratory activity and baseline noise (null, 95% CI null, p=<0.05). ECG leads achieved an SNRbase of 6.00 ±3.04 dB during quiet breathing, demonstrating their potential for monitoring respiratory muscle activity without compromising cardiac signals.
www.synapsesocial.com/papers/69b79e6e8166e15b153abbfa — DOI: https://doi.org/10.18416/automed.2026.2500