Key result
A long-term continuous ambulatory ECG monitor using ESP32 was developed, featuring 3-lead acquisition, real-time beat-to-beat heart rate measurement, and an average battery life of 84 hours.
The developed ESP32-based ambulatory ECG monitor provides high-resolution, long-term continuous monitoring with real-time beat-to-beat heart rate measurement and low power consumption.
May support real-time multi-lead ambulatory monitoring; leaves open clinical validation before practice adoption.
This work presents a long-term continuous ambulatory ECG monitor for simultaneous acquisition and storage of leads DI, aVF, and V2, and beat-to-beat R wave detection using wavelet transform for heart rate measurement in real-time. The monitor has as its core the low-power ADS1294 analogue front-end of 4 channels, 24-bit analog-to-digital converters and programmable gain amplifiers, the low-power dual-core ESP32 microcontroller, a 32 GB micro SD memory for data storage and a 1.4 in thin-film transistor liquid crystal display (LCD) variant with a resolution of 128 x 128 pixels. The monitor has sampling rates of 1000 Hz, 500 Hz, and 250 Hz, bandwidth from 0 Hz to half the selected sampling rate, a CMRR of –115 dB, a resolution of 286 nV, a current consumption of 50 mA for an average battery life of 84 h, a lead-off detection and a real-time beat-to-beat heart rate measurement.
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Martínez-Suárez et al. (2022) studied this question. Long-term continuous ambulatory ECG monitor using ESP32 was evaluated on Device technical specifications and performance. A long-term continuous ambulatory ECG monitor using ESP32 was developed, featuring 3-lead acquisition, real-time beat-to-beat heart rate measurement, and an average battery life of 84 hours.
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