Table 2. Comparison of ECG characteristics according to heart failure hospitalization.
| Heart failure hospitalization (+) (n = 44) | Heart failure hospitalization (-) (n = 99) | p value | |
|---|---|---|---|
| Baseline ECG | |||
| Heart rate (beats/min) | 70.6±12.2 | 69.6±13.2 | 0.6528 |
| QRS duration (ms) | 92.7±6.9 | 93.9±7.8 | 0.3465 |
| Follow-up ECG | |||
| Heart rate (beats/min) | 67.4±18.4 | 67.8±12.8 | 0.8968 |
| QRS duration (ms) | 142.8±14.3 | 138.6±11.5 | 0.0690 |
| Temporal increase in QRS duration (ms/year)* | 6.4±7.0 | 4.4±2.6 | 0.0184 |
| RBBB pattern (n, %) | 21, 46.7 | 78, 79.6 | <0.0001 |
| RBBB pattern with LAH (n, %) | 3, 6.7 | 6, 6.1 | 0.9014 |
| LBBB pattern (n, %) | 14, 31.1 | 8, 8.2 | 0.0007 |
| NSIVCD pattern (n, %) | 7, 15.6 | 6, 6.1 | 0.0792 |
Data are presented as mean ± SD or n (%). RBBB = right bundle branch block, LAH = left anterior hemiblock, LBBB = left bundle branch block, NSIVCD = nonspecific intraventricular conduction disturbance.
*Temporal increase indicates the difference in measures of QRS duration between the baseline ECG and the follow-up ECG.