Table 1.
Automatic Corrected QT (QTc) Interval Analysis in Postinfarction Patients with and without Ventricular Tachyarrhythmias (Reproduced with Permission from Homs et al. 26 )
| VT Group (n = 14) | No VT Group (n = 28) | P value | |
|---|---|---|---|
| Total of beats automatically analyzed | 682,960 | 1,276,498 | – |
| Mean QTc interval (ms) | 425 ± 20 | 405 ± 17 | <0.01 |
| Mean QT interval (ms) | 376 ± 33 | 373 ± 30 | NS |
| Mean RR interval (ms) | 780 ± 80 | 830 ± 114 | NS |
| Total number of peaks of QTc >500 ms | 11,112 (1.62%) | 823 (0.06%) | <0.005 |
| Patients with peaks of QTc >500 ms | 7 (50%) | 2 (7%) | <0.005 |
| Patients with grouped peaks (clusters) of QTc >500 ms | 4 (28%) | None | <0.02 |