Table 2.
Comparative analysis of ECG morphology and measurements between phases.
| Baseline-Phase | Released-Phase | δ Released-Baseline (IC95%) | p-Value | ||
|---|---|---|---|---|---|
| QRS (ms) | 98.50 (±21.78) | 131.0 (±25.77) | 32.5 (31.5–33.6) | p < 0.001 | |
| Axis (degrees) | 8.55° (±36.2) | 3.18º (±43.64) | p = 0.376 | ||
| LBBB % (N) | 0 | 39% (9) | p = 0.001 | ||
| RBBB % (N) | 9% (2) | 17% (4) | p = 0.162 | ||
| LAFH % (N) | 13% (3) | 13% (3) | |||
| LPFH % (N) | 0 | 0 | |||
| QT (ms) | 409.2 (±37.63) | 444.6 (±45.41) | 35.4 (33.4–37.4) | p < 0.001 | |
| 50bpm | 469.33 (±27.09) | 520.0 (±17.53) | |||
| 60bpm | 448.53 (±26.44) | 477.16 (±37.80) | |||
| 70bpm | 432.44 (±22.96) | 468.0 (±31.79) | |||
| 80bpm | 417.37 (±24.59) | 454.48 (±32.06) | |||
| 90bpm | 401.60 (±19.53) | 435.60 (±34.58) | |||
| 100bpm | 382.22 (±2.08) | 417.33 (±33.97) | |||
| 110bpm | 368.67 (±20.60) | 404.67 (±30.60) | |||
| 120bpm | 359.67 (±17.31) | 388.0 (±31.42) | |||
| QTpeak (ms) | 322.2 (±32.12) | 353.6 (±44.46) | 31.3 (27.8–35.2) | p = 0.001 | |
| Tpeak-Tend (ms) | 87.0 (±19.31) | 91.07 (±28.35) | 4.07 (−0.16–7.90) | p = 0.044 | |
| QRSend-Tpeak (ms) | 223.7 (±34.64) | 222.5 (±43.92) | −1.18 (−4.84–2.61) | p = 0.563 | |
| QTc Bazett’s (ms) | 480.9 (±31.47) | 522.5 (±4.21) | 41.6 (38.6–44.5) | p < 0.001 | |
| QTc Fridericia (ms) | 454.5 (±23.92) | 493.8 (±35.16) | 39.3 (36.8–41.8) | p < 0.001 | |
| QTc Framingham (ms) | 449.2 (±22.35) | 484.4 (±31.95) | 35.3 (33.2–37.4) | p < 0.001 | |
| QTc Hodges (ms) | 453.6 (±21.65) | 488.9 (±31.19) | 35.4 (33.4–37.4) | p < 0.001 | |
LBBB: left bundle branch block; RBBB: right bundle branch block; LAFH: left anterior fascicular hemiblock; LPFH: left posterior fascicular hemiblock.