Table 3. ECG Basic Characteristics Based on Heart Failure Type.
| ECG parameter | HFpEF (n = 50) | HFrEF (n = 60) | Total (n = 110) | P |
|---|---|---|---|---|
| LAH, n (%) | 6 (12) | 22 (36.7) | 28 (25.5) | 0.003 |
| LVH, n (%) | 15 (30) | 33 (55) | 48 (43.6) | 0.008 |
| Poor R wave, n (%) | 5 (10) | 30 (50) | 35 (31.8) | < 0.0001 |
| LAD, n (%) | 15 (30) | 27 (45) | 42 (38.2) | 0.107 |
| RAD, n (%) | - | 3 (5) | 3 (2.7) | 0.249 |
| Q wave, n (%) | 9 (18) | 17 (28.3) | 26 (23.6) | 0.204 |
| Wide QRS, n (%) | 10 (20) | 43 (71.7) | 53 (48.2) | < 0.0001 |
| QRS duration, ms (± SD) | 97.3 ± 20.7 | 124 ± 30.4 | ||
| LBBB, n (%) | - | 12 (20) | 12 (10.9) | 0.001 |
| RBBB, n (%) | 7 (14) | 3 (5) | 10 (9.1) | 0.181 |
| ST-T changes, n (%) | 19 (38) | 42 (70) | 61 (55.4) | 0.001 |
| Prolong QT, n (%) | 19 (38) | 50 (83.3) | 69 (62.7) | < 0.0001 |
| Interval QTc, ms (± SD) | 453.2 ± 42.8 | 499 ± 50.9 |
LAH: left atrial hypertrophy; LVH: left ventricular hypertrophy; LAD: left axis deviation; RAD: right axis deviation; LBBB: left bundle branch block; RBBB: right bundle branch block.