Table 4 QTc interval and characteristics of the J wave between 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 | |
|---|---|---|---|---|
| Presence of J wave, No (%) | 30 (37) | 15 (75) | 15 (25) | 0.001 |
| Slur-Notch, No (%) | ||||
| Slur | 4 (5) | 2 (10) | 2 (3) | 0.57 |
| Notch | 26 (32) | 13 (65) | 13 (21) | 0.001 |
| Localization, No (%) | ||||
| Inferior | 21 (26) | 9 (45) | 12 (20) | 0.04 |
| Inferolateral (both)* | 3 (3) | 2 (10) | 1 (1) | 0.15 |
| Magnitude of J wave, No (%) | ||||
| Amplitude ≥ 0.2 mV | 11 (13) | 9 (45) | 2 (3) | 0.001 |
| J point elevation ≥ 0.2 mV & inferolateral leads location† | 10 (12) | 8 (40) | 2 (3) | < 0.001 |
| J point with ST segment, No (%) | ||||
| Ascending | 6 (7) | 2 (10) | 4 (6) | 0.64 |
| Horizontal/descending | 24 (30) | 13 (65) | 11 (18) | < 0.001 |