Table 3.
Preoperative ECG Characteristics
| Variable |
Value |
|||
|---|---|---|---|---|
| Fundamental Rhythm | ||||
| -Normal Sinus | 421 (72%) | |||
| -Sinus Bradycardia (<60) | 124 (21%) | |||
| -Sinus Tachycardia (≥100) | 27 (5%) | |||
| -Atrial Fibrillation | 6 (1%) | |||
| -Other Supraventricular Rhythm |
10 (2%) |
|||
| Ventricular Rate | ||||
| -Mean ±SD | 72 ±15 | |||
| -Median | 70 | |||
| -Quartile ranges |
36−60, 61−70, 71−80, 81−138 |
|||
| QT interval-absolute (msec) | ||||
| -Mean ±SD | 402 ±49 | |||
| -Median | 397 | |||
| -Range |
264−700 |
|||
| Corrected QT interval (QTc) (msec) | ||||
| -Mean ±SD | 433 ±39 | |||
| -Median | 427 | |||
| -Range | 350−658 | |||
| -QTc > 440, N (%) |
205 (35%) |
|||
| ECG abnormalities in patients who had at least one abnormality (N=468): |
Distribution |
|||
| |
Inferior |
Lateral |
Anterior |
Total |
| -Non-specific ST-T wave abnormalities | 214 | 168 | 179 | 561 (62%) |
| -ST elevation | 2 | 3 | 113 | 118 (13%) |
| -T wave inversion | 16 | 17 | 50 | 83 (9%) |
| -ST depression | 26 | 0 | 36 | 62 (7%) |
| -Abnormal Q or QS | 25 | 7 | 18 | 50 (6%) |
| -Peaked upright T wave | 5 | 0 | 24 | 29 (3%) |
| -Giant T wave inversion | 0 | 0 | 4 | 4 (<1%) |
| TOTAL (% of total) | 288 (32%) | 195 (21%) | 424 (47%) | 907 (100%) |