Table 8.
ECG QT interval duration and correlation coefficients comparison between Smartwatch and standard 12-leads ECG.
| Variables | Lead | SW-ECG | 12-Leads ECG | Correlation coefficient | p-value |
|---|---|---|---|---|---|
| QT duration (milliseconds) | DI | 380.3 ± 41.85 | 385.01 ± 36.86 | 99.2 % | <0.05 |
| V1 | 379.58 ± 52.57 | 384.32 ± 33.75 | 98.8 % | <0.05 | |
| V3 | 370.09 ± 36.97 | 386.28 ± 35.46 | 99.3 % | <0.05 | |
| V6 | 374.71 ± 36.93 | 382.11 ± 34.63 | 99.5 % | <0.05 | |
| Corrected QT duration (milliseconds) | DI | 417.53 ± 41.85 | 410.21 ± 31.3 | 99.4 % | <0.05 |
| V1 | 417.48 ± 47.98 | 409.18 ± 32.5 | 99.1 % | <0.05 | |
| V3 | 411.37_±35.83 | 411.44 ± 30.2 | 99.4 % | <0.05 | |
| V6 | 412.56 ± 37.15 | 408.98 ± 31.8 | 99.7 % | <0.05 |