Table 1 List of the 13 difference features
#Feature | Abbreviation | Units | Description |
|---|---|---|---|
1 | \(\Delta QRSdur\) | ms | QRS-duration difference |
2 | \(\Delta QT\) | ms | QT-interval difference |
3 | \(\Delta |{\overline{QRSmax}}|\) | μV | Difference in maximal QRS-vector magnitude |
4 | \(\Delta |{\overline{Tmax}}|\) | μV | Difference in maximal T-vector magnitude |
5 | \(\Delta |{\overline{QRSintg}}|\) | mV·ms | QRS-integral vector magnitude difference |
6 | \(\Delta |{\overline{Tintg}}|\) | mV·ms | T-integral vector magnitude difference |
7 | \(\Delta QRScmplx\) | % | QRS-complexity difference |
8 | \(\Delta Tcmplx\) | % | T-wave complexity difference |
9 | \(|\overline{\Delta VG}|\) | mV·ms | Magnitude of the ventricular-gradient difference vector |
10 | \(|\Delta SA|\) | ° | Magnitude of the QRS-T spatial-angle difference |
11 | \(\Delta HR\) | bpm | Heart-rate difference |
12 | \(|\overline{\Delta J}|\) | μV | Magnitude of J-vector difference vector |
13 | \(\Delta Tsym\) | % | T-wave symmetry difference |