Table 2.
ECG findings in HAT patients 12–13 years after treatment compared to a control group.
| Parameter/characteristic at 10–13 years follow-up | Stage I (n = 51) | Stage II (n = 18) | pa | Controls (n = 69) | pa, b |
|---|---|---|---|---|---|
| ECG intervals [msec] (Mean ± SD) | |||||
| PQ | 154.3 ± 22.1 | 155.9 ± 32.0 | 0.8153 | 162.6 ± 31.5 | 0.1331 |
| QRS | 82.7 ± 10.6 | 84.1 ± 15.0 | 0.9407 | 85.0 ± 13.3 | 0.3900 |
| Mean QTc (Bazett corrected) | 425.2 ± 29.1 | 421.2 ± 34.2 | 0.5753 | 427.6 ± 27.3 | 0.4930 |
| ECG findings: n (%) | |||||
| Rhythm | |||||
| Sinus | 51 (100.0) | 18 (100.0) | 0.9999 | 69 (100.0) | 0.999 |
| Atrial fibrillation | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
| Atrial flutter | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
| Premature atrial capture beats | |||||
| None | 48 (94.1) | 17 (94.4) | 0.9999 | 67 (97.1) | 0.6805 |
| Present | 3 (5.9) | 1 (5.6) | 2 (2.9) | ||
| Premature ventricular capture beats | |||||
| None | 47 (92.2) | 16 (88.9) | 0.3414 | 63 (91.3) | 0.9900 |
| Present | 4 (7.8) | 1 (5.6) | 6 (8.7) | ||
| Ventricular bigeminy | 0 (0.0) | 1 (5.6) | 0 (0.0) | ||
| Couplet/triplet | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
| Salves | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
| AV block | |||||
| None | 51 (100.0) | 17 (94.4) | 0.2609 | 66 (95.7) | 0.6195 |
| AV block 1 | 0 (0.0) | 1 (5.6) | 3 (4.3) | ||
| AV block 2 | 0 (0.0) | (0.0) | 0 (0.0) | ||
| AV block 3 | 0 (0.0) | (0.0) | 0 (0.0) | ||
| Atrial hypertrophy | |||||
| None | 48 (94.1) | 17 (94.4) | 0.9999 | 68 (98.5) | 0.3658 |
| Right | 3 (5.9) | 1 (5.6) | 1 (1.5) | ||
| Left | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
| RVH: Sokolow right | |||||
| Negative | 51 (100.0) | 16 (88.8) | 0.0652 | 66 (95.6) | 0.8332 |
| Positive | 0 (0.0) | 2 (11.1) | 3 (4.4) | ||
| LVH (Sokolow) | |||||
| Negative | 51 (100.00 | 18 (100.0) | 0.9999 | 67 (97.1) | 0.9999 |
| Positive | 0 (0.0) | 0 (0.0) | 2 (2.9) | ||
| Pathological q | |||||
| None | 51 (100.00) | 18 (100.0) | 68 (100.0) | – | |
| Ventricular block | |||||
| None | 49 (96.0) | 15 (83.4) | 0.1072 | 67 (97.0) | 0.4409 |
| Present: either RBBB or LBBB or LAFB or RBBB and LAFB | 2 (4.0) | 3 (16.6) | 2 (3.0) | ||
| RBBB | 1 (2.0) | 0 (0.0) | 1 (1.5) | ||
| LBBB | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
| LAFB | 1 (2.0) | 2 (11.1) | 1 (1.5) | ||
| RBBB and LAFB | 0 (0.0) | 1 (5.6) | 0 (0.0) | ||
| Repolarization changes | |||||
| No | 44 (86.3) | 17 (94.4) | 0.6705 | 59 (85.5) | 0.8012 |
| Yes | 7 (13.7) | 1 (5.6) | 10 (14.5) | ||
| Peripheral low voltage | |||||
| Normal | 27 (52.9) | 9 (50.0) | 0.8487 | 50 (72.5) | 0.0265 |
| Low voltage | 24 (47.1) | 9 (50.0) | 19 (27.6) | ||
SD = standard deviation.
a
Mann-Whitney U test for continuous parameters and Fisher's exact test for categorical parameters.
b
For the comparison of 69 patients and 69 controls.