Clinical Applicability of a Textile 1-Lead ECG Device for Overnight Monitoring

Figure 1. Placement of the gel electrodes and the ECG-belt.

Figure 2. A representative sample of ECG waveforms for gel electrodes and the ECG-belt.

Figure 3. Line of identity (dashed line) for RR-intervals measured using gel electrodes and the ECG-belt. Solid line, regression line incl. fit equation.

Figure 4. Bland-Altman plot of RR-intervals measured using gel electrodes and the ECG-belt. Solid line, mean difference; dashed lines, upper and lower 95% confidence intervals.

Figure 5. Data about artefacts observed for individual ECG-belt and number of use (n). (A) The median and interquartile range of artefacts observed for individual ECG-belts. (B) Average difference (standard deviation) in artefacts between ECG-belt and gel electrodes and standard deviation to emphasize ECG-belt associated artefacts. (C) The average change in artefacts (standard deviation) for consecutive applications of individual ECG-belts.

Figure 6. Influence of body position on the occurrence of artefacts for RR-interval measurements using gel electrodes and the ECG-belt. The influence of body position (supine, prone, left body side, right body side) on measurement quality is presented. Data relate to 13 or fewer applications of a belt. A, gel electrodes; B, ECG-belt. Supine, patient lying on the back; prone, patient lying on the chest; left and right, patient lying laterally Black part of boxes indicates upper quartile; white part of boxes indicates the lower quartile. Whiskers represent data for maximal values.