TABLE 3.
Assessing the standard 12 ECG leads and two right‐sided precordial ECG leads based on the severity of RV dysfunction.
| Characteristic | Without RV dysfunction | With RV dysfunction | p | ||
|---|---|---|---|---|---|
| Control (N = 60) | p | Nonsevere (N = 43) | Severe (N = 17) | ||
| Axis | |||||
| Normal | 53 (88.3) | <0.001 | 19 (44.2) | 6 (35.3) | 0.814 |
| RAD | 1 (1.7) | 15 (34.9) | 6 (35.3) | ||
| LAD | 3 (5) | 1 (2.3) | 1 (5.9) | ||
| Undetermined | 3 (5) | 8 (18.6) | 4 (23.5) | ||
| Rhythm | |||||
| Atrial fibrillation | 2 (3.3) | <0.001 | 6 (14.0) | 2 (11.8) | 0.495 |
| Normal sinus rhythm | 58 (96.7) | 37 (86.0) | 15 (88.2) | ||
| P wave | |||||
| Normal | 56 (93.3) | <0.001 | 30 (69.8) | 10 (58.8) | 0.425 |
| LA abnormality | 2 (3.3) | 1 (2.3) | 2 (11.8) | ||
| RA abnormality | 2 (3.3) | 12 (27.9) | 5 (29.4) | ||
| QRS width | |||||
| Narrow | 56 (93.3) | 0.224 | 37 (86.0) | 15 (88.2) | 0.856 |
| Wide | 4 (6.7) | 6 (14.0) | 2 (11.8) | ||
| QRS pattern in right‐sided precordial leads | |||||
| QS | 2 (3.3) | <0.001 | 12 (27.9) | 1 (5.8) | 0.001 |
| R | 7 (11.7) | 6 (14.0) | 2 (11.8) | ||
| Rs | 5 (8.3) | 1 (2.3) | 2 (11.8) | ||
| qR | 4 (6.7) | 11 (25.6) | 7 (41.2) | ||
| rS | 31 (51.7) | 12 (27.9) | 5 (29.4) | ||
| rsR′ | 1 (1.7) | 1 (2.3) | 0 (0) | ||
| QRS voltage in right‐sided precordial leads | 7.13 ± 0.45 | 7.10 ± 0.31 | 0.928 | ||
| R‐wave progression | |||||
| Normal | 49 (81.7) | 0.005 | 25 (58.2) | 9 (52.9) | 0.115 |
| Late | 3 (5) | 9 (20.9) | 5 (29.5) | ||
| Early | 8 (13.3) | 9 (20.9) | 3 (17.6) | ||
| ST segment in right‐sided precordial leads | |||||
| Normal | 58 (96.7) | <0.001 | 34 (79.1) | 10 (59.0) | 0.001 |
| Depression | 2 (3.3) | 9 (20.9) | 7 (41.0) | ||
| T wave in right‐sided precordial leads | |||||
| Normal | 22 (36.7) | <0.001 | 5 (11.6) | 1 (5.9) | 0.047 |
| Negative | 38 (63.3) | 38 (88.4) | 16 (94.1) | ||
Abbreviations: LAD, left axis deviation; N, number; p, p value; RAD, right axis deviation.