Noises and interruption during ECG monitoring
The electromyographic noise, the electrode motion artifacts, and the temporary interruption of ECG signals were observed (Figure 6A ). The median percentage of the total duration of noise signals and temporary interruption during the whole monitoring duration was 0.9% (range 0.1–4.5%). Figure 6B shows the relationship between the monitoring duration and the percentage of the noises/interruption of the monitoring. The monitoring duration did not have a significant correlation with the duration of the noises and the ECG signal interruption.