Table 2.
Electrocardiographic determinations.
| All patients Mean ± SD or n (%) |
No PH Mean ± SD or n (%) |
PH Mean ± SD or n (%) |
P (T-test / Fisher’s exact test) |
|
|---|---|---|---|---|
| N | 228 | 111 | 117 | |
| Rhythm | 0.62 | |||
| -Sinus | 222 (97.8) | 110 (99.1) | 112 (96.6) | |
| -Atrial Fibrillation | 1 (0.4) | 0 (0) | 1 (0.9) | |
| -Nodal | 4 (1.8) | 1 (0.9) | 3 (2.6) | |
| Heart rate (bpm) | 81.5 ± 16.6 | 80.5 ± 15.5 | 82.5 ± 17.5 | 0.35 |
| P wave axis (degrees) | +38.8 ± 19.0 | +34.8 ± 18.9 | +42.7 ± 18.5 | 0.002 |
| P wave amplitude V1 (mA) | 0.14 ± 0.06 | 0.13 ± 0.06 | 0.14 ± 0.07 | 0.11 |
| P wave amplitude lead II (mA) | 0.14 ± 0.06 | 0.13 ± 0.05 | 0.15 ± 0.06 | 0.02 |
| PR interval (ms) | 152.2 ± 24.0 | 153.3 ± 22.7 | 151.1 ± 25.3 | 0.51 |
| QRS complex (ms) | 92.2 ± 16.2 | 90.9 ± 14.7 | 93.4 ± 17.4 | 0.24 |
| QRS axis (degrees) | +23.2 ± 46.2 | +10.5 ± 30.9 | +35.2 ± 54.4 | <0.001 |
| R wave lead V1 (mA) | 0.29 ± 0.26 | 0.26 ± 0.21 | 0.32 ± 0.29 | 0.13 |
| S wave lead V1 (mA) | 0.81 ± 0.47 | 0.87 ± 0.45 | 0.75 ± 0.48 | 0.07 |
| R/S ratio lead V1 | 0.59 ± 1.2 | 0.48 ± 1.0 | 0.71 ± 1.3 | 0.15 |
| QTc interval (ms) | 442.7 ± 38.5 | 439.1 ± 35.4 | 446.2 ± 41.1 | 0.17 |
| T wave axis (degrees) | +23.8 ± 34.6 | +28.9 ± 29.5 | +18.9 ± 38.4 | 0.03 |
| RBBB | 10 (4.4) | 4 (3.6) | 6 (5.1) | 0.75 |
| IRBBB | 34 (14.9) | 10 (9.0) | 24 (20.5) | 0.02 |
| qR complex in lead V1 | 6 (2.6) | 0 (0) | 6 (5.1) | 0.03 |
| QS complex in lead V1 | 6 (2.6) | 1 (0.9) | 5 (4.3) | 0.02 |
| Negative T wave in V1–V3 | 140 (61.4) | 64 (57.7) | 76 (65.0) | 0.28 |
| Negative T wave in inferior leads | 113 (49.6) | 50 (45.0) | 63 (53.8) | 0.19 |
| ST segment depression in V1–V3 | 27 (11.8) | 7 (6.3) | 20 (17.1) | 0.01 |
|
ST segment depression in inferior leads |
5 (2.2) | 0 (0) | 5 (4.3) | 0.06 |
Abbreviations: bpm: beats-per-minute, IRBBB: incomplete right bundle branch block, RBBB: right bundle branch block, RHC: right heart catheterization.