摘要：The assessment of heart rate variability (HRV) is a simple non-invasive measurement technique that shows oscillations between the R-R intervals of the QRS complex. Instruments such as the ECG, heart rate monitors, and analog converters are used to assess the HRV in linear or nonlinear ways. However, more modern and simplified devices are required to monitor and interpret HRV. This study analyzed the correlation between a WCS Pulse device designed to measure R-R intervals and the electrocardiogram (ECG). The mean ± SD for the R-R intervals using the WCS Pulse and the ECG were 913.6 ± 82.2 ms and 988.1 ± 96.8 ms, respectively. For the SDNN values, the WCS Pulse was 82.2 ± 27.2 ms and the ECG was 86.1 ± 26.1 ms, and for the HR values, the WCS Pulse was 66.1 ± 10.8 beats•min-1 and the ECG was 61.4 ± 6.4 beats•min-1 . The Pearson’s correlation coefficient indicated that all the variables presented a strong correlation. R-R values were r = 0.93 and r~2 = 0.8648. For SDNN, the values were r = 0.9844 and r~2 = 0.9691 for time domain. Lastly, HR presented r = 0.9391 and r~2 = 0.882. All variables presented a significant difference of P<0.0001. The intraclass correlations were 0.7779 for R-R, 0.9633 for SDNN, and 0.7662 for HR, which represents an excellent reproducibility.
关键词：Autonomic Nervous System;Devices for Measuring RR-Intervals;Heart Rate
