Table 3.
The Comparison Between Each Follow-Up Time Point and Pre-Intervention ECG Data
| Variables | Pre-Intervention | Post-Intervention | P-value* | Follow-Up at 6 Months | P-value† | Follow-Up at 12 Months | P-value‡ | Follow-Up at 24 Months | P-value§ |
|---|---|---|---|---|---|---|---|---|---|
| Heart rate (bpm) | 85.3±21.7 | 78.5±14.7 | 0.007 | 82.1±16.2 | 0.830 | 84.8±16.5 | 0.675 | 85.5±20.9 | 0.052 |
| QRS interval (ms) | 104.6±28.2 | 99.6±26.0 | 0.561 | 101.0±33.7 | 0.132 | 100.1±25.5 | 0.370 | 100.9±27.9 | 0.713 |
| QT interval (ms) | 386.3±51.7 | 398.5±50.7 | 0.016 | 400.0±56.7 | 0.883 | 376.4±71.1 | 0.143 | 358.4±49.8 | 0.188 |
| QTc (ms) | 433.7±49.0 | 443.1±46.3 | 0.182 | 460.7±46.8 | 0.036 | 452.8±45.7 | 0.381 | 420.3±47.1 | 0.178 |
| QRS axis (degrees) | 20.6±39.7 | 26.6±39.5 | 0.084 | 29.3±45.2 | 0.281 | 23.8±43.8 | 0.851 | 37.2±30.5 | 0.443 |
Notes: *P-value represents the comparison between post-intervention versus pre-intervention for ECG variables after LAAO intervention. †P-value represents the comparison between follow-up at 6 months versus pre-intervention for ECG variables after LAAO intervention. ‡P-value represents the comparison between follow-up at 12 months versus pre-intervention for ECG variables after LAAO intervention. §P-value represents the comparison between follow-up at 24 months versus pre-intervention for ECG variables after LAAO intervention.