Table 4. Electrocardiogram findings according to mortality.
| Electrogram variables | Alive | Death | p value |
|---|---|---|---|
| Atrial fibrillation or flutter | 8 (3.8) | 9 (15.5) | 0.003 |
| Heart rate (beats per minute) | 81.3±17.5 | 103.4±23.2 | <0.001 |
| PR interval (ms) | 165.2±26.1 | 157.5±26.9 | 0.066 |
| QRS duration (ms) | 93.9±13.5 | 103.2±30.1 | 0.026 |
| Longest QT (ms) | 407.7±48.9 | 391.7±50.1 | 0.029 |
| Shortest QT (ms) | 372.5±46.0 | 331.6±48.5 | <0.001 |
| Longest QTc (ms) | 468.1±36.8 | 505.7±40.4 | <0.001 |
| Shortest QTc (ms) | 427.3±32.9 | 427.5±39.6 | 0.962 |
| QT dispersion (ms) | 35.3±20.9 | 60.1±30.5 | <0.001 |
| QTc dispersion (ms) | 40.8±24.6 | 78.2±41.1 | <0.001 |
| Longest Tpeak to end (ms) | 104.5±31.5 | 109.8±31.6 | 0.251 |
| Shortest Tpeak to end (ms) | 68.8±18.4 | 63.6±18.4 | 0.056 |
| Longest Tpeak to end-c (ms) | 119.8±33.1 | 142.8±42.6 | <0.001 |
| Shortest Tpeak to end-c (ms) | 79.0±19.7 | 82.6±24.8 | 0.304 |
| Tpeak to end dispersion (ms) | 35.7±22.3 | 46.3±28.1 | 0.009 |
| Tpeak to end-c dispersion (ms) | 40.8±24.5 | 60.2±37.3 | <0.001 |
| T inversion | 34 (16.3) | 8 (13.8) | 0.799 |
| Atrial premature complex | 17 (8.1) | 5 (8.6) | 1.000 |
| Right bundle branch block | 7 (3.3) | 8 (13.8) | 0.005 |
| Left bundle branch blovk | 3 (1.4) | 1 (1.7) | 1.000 |
| Left ventricular hypertrophy | 7 (3.3) | 4 (6.9) | 0.407 |
| Right ventricular hypertrophy | 1 (0.5) | 0 (0.0) | 1.000 |
Data are presented as number (%) or mean±standard deviation.
QTc = corrected QT; Tpe = interval of the peak to end of T wave; Tpe-c = corrected interval of the peak to end of T wave.