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Updated: Mar 6, 2026
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An Application for Pairing with Wearable Devices to Monitor Personal Health Status
Published on: February 3, 2022
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Beat-to-beat heart rate detection by smartphone's accelerometers: validation with ECG
Summary
Smartphone accelerometers can accurately measure beat-to-beat heart rate using seismocardiography (SCG) signals. This non-invasive method shows high feasibility and accuracy compared to ECG, offering a new way to monitor cardiovascular health.
Area of Science:
- Biomedical Engineering
- Cardiovascular Physiology
- Mobile Health Technology
Background:
- Mobile phones offer potential for continuous health monitoring.
- Seismocardiography (SCG) records heart vibrations transmitted to the chest wall.
- Accurate beat-to-beat heart rate measurement is crucial for cardiovascular assessment.
Purpose of the Study:
- To evaluate the feasibility and accuracy of measuring beat-to-beat heart rate using smartphone accelerometers.
- To assess the efficacy of seismocardiographic (SCG) signals for heart rate monitoring.
- To compare smartphone-based SCG heart rate measurements with electrocardiogram (ECG) data.
Main Methods:
- Healthy male volunteers underwent SCG signal acquisition using smartphones.
- Smartphones were positioned on the thorax and navel in supine and standing postures.
- An automated algorithm detected SCG peaks to compute beat-to-beat intervals, compared against ECG RR intervals.
Main Results:
- Feasibility of SCG heart rate measurement was high across different positions and postures (up to 100%).
- The automated algorithm achieved >98% accuracy in identifying cardiac beats.
- Strong linear correlation (r2 > 0.98) was observed between SCG-derived and ECG-derived heart rates.
Conclusions:
- Smartphone-based SCG is a feasible and accurate method for beat-to-beat heart rate monitoring.
- The developed automated algorithm demonstrates robustness and high precision.
- This approach offers a promising, non-invasive tool for remote cardiovascular health assessment.
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