Table 2. Comparison of electrocardiographic parameters between novel telemonitoring system using a single-lead ECG patch and the conventional telemonitoring system in inpatient setting.
| Variables | Novel telemonitoring system* (n=80) | Conventional telemonitoring system† (n=80) | 95% limits of agreement | ICC (95% CI) | p value for reliability | p value for difference |
|---|---|---|---|---|---|---|
| Monitoring time (minute) | 1,408 (1,215–1,827) | 1,408 (1,215–1,827) | - | - | - | - |
| Total QRS complex (No.) | 69,635 (54,756–90,223) | 66,601 (53,749–88,667) | −14,573, 10,851 | 0.999 (0.998–0.999) | <0.001 | <0.001 |
| Total atrial premature complex (No.) | 99 (19–375) | 100 (19–377) | −181, 137 | 0.998 (0.997–0.999) | <0.001 | 0.001 |
| Total ventricular premature complex (No.) | 5 (0–97) | 5 (0–88) | −308, 335 | 0.999 (0.998–0.999) | <0.001 | 0.003 |
| AF burden‡ (%) | 26.1 (10.1–100.0) | 27.2 (10.0–100.0) | −3.8, 4.3 | 0.995 (0.978–0.999) | <0.001 | 0.116 |
| Maximum HR (/min) | 114.1±27.6 | 104.8±21.6 | −37.8, 19.3 | 0.906 (0.853–0.940) | <0.001 | <0.001 |
| Minimum HR (/min) | 54.7±10.9 | 55.5±10.1 | −6.6, 8.2 | 0.967 (0.949–0.979) | <0.001 | 0.049 |
| Average HR (/min) | 72.2±12.1 | 71.7±12.0 | −6.1, 5.1 | 0.986 (0.978–0.991) | <0.001 | 0.151 |
| Pause (second) | 1.3 (1.2–1.7) | 1.4 (1.3–1.8) | −0.09, 0.17 | 0.997 (0.996–0.998) | <0.001 | <0.001 |
Data are mean ± standard deviation or median (interquartile range).
AF = atrial fibrillation; ECG = electrocardiogram; HR = heart rate; ICC = intra-class correlation coefficient.
*ThynC™, Seers Technology, Seongnam, Korea.
†IntelliVue MX40 Patient Wearable Monitor, Philips, New York, NY, USA.
‡Among a total of 80 participants, AF was detected in 9 participants. Both the novel telemonitoring system using a single-lead ECG patch and the conventional system detected AF in the same 9 participants. The AF burden data was calculated from the 9 participants only.