Table 2 ECG and laboratory findings in the VT and Non-VT group
From: The relationship between J wave and ventricular tachycardia during Takotsubo cardiomyopathy
| Total (n = 79) | VT group (n = 20) | Non-VT group (n = 59) | P value | |
|---|---|---|---|---|
| Electrocardiographic changes | ||||
| Atrial arrhythmia, n (%) | 26 (33) | 12 (60) | 14 (25) | 0.003 |
| AV block, n (%) | 2 (2) | 0 (0) | 2 (3) | 1.000 |
| ST-segment elevation, n (%) | 36 (45) | 9 (45) | 27 (45) | 1.000 |
| T-wave inversion, n (%) | 55 (68) | 16 (80) | 39 (65) | 0.27 |
| Q wave, n (%) | 18 (22) | 4 (20) | 14 (23) | 0.51 |
| QTc interval, ms | 545.2 ± 63.6 | 577.0 ± 58.5 | 534.2 ± 61.1 | 0.01 |
| Laboratory findings | ||||
| Sodium, mmol/L | 139.1 ± 4.9 | 139.6 ± 5.9 | 138.9 ± 4.6 | 0.59 |
| Potassium, mmol/L | 4.1 ± 0.7 | 3.9 ± 0.8 | 4.1 ± 0.7 | 0.64 |
| Ionized calcium, mg/dL | 0.96 ± 0.1 | 0.95 ± 0.1 | 0.97 ± 0.1 | 0.51 |
| Magnesium, mg/dL | 2.1 ± 0.4 | 2.1 ± 0.4 | 2.2 ± 0.4 | 0.16 |
| Cardiac enzymes | ||||
| Peak CK, ng/mL | 827.2 ± 1409.9 | 1008.5 ± 1634.4 | 766.7 ± 1336.7 | 0.51 |
| Peak CK-MB, ng/mL | 30.7 ± 46.9 | 49.1 ± 69.7 | 24.7 ± 35.1 | 0.15 |
| Peak troponin-I, ng/mL | 9.8 ± 20.6 | 16.5 ± 34.1 | 7.7 ± 13.3 | 0.28 |
| NT-proBNP, pg/mL | 12900.2 ± 13370.2 | 14179.8 ± 13207.2 | 12293.6 ± 13499.0 | 0.28 |