Table 2.
Comparison of electrocardiographic baseline and 24-h Holter variables between the control group and the intervention group
| Variable | Control group (n = 19) | Intervention group (n = 18) | p |
|---|---|---|---|
| Baseline ECG | |||
| HR (bpm, median IQ)) | 64(55-73) | 56 (52-60) | 0.036* |
| PRi Interval (ms, median IQ) | 160 (151-194) | 192 (175-230) | 0.029* |
| QRS duration (ms, median IQ) | 135 (96-150) | 147 (118-154) | 0.343 |
| QTc Interval (ms. mean ± SD) | 437 ± 31 | 448 ± 33 | 0.300 |
| LBBB (n, %) | 1 (5.3%) | 0 | 1.000 |
| RBBB (n, %) | 10 (52.6%) | 14 (77.8%) | 0.170 |
| LAHB (n, %) | 5 (26.3%) | 10 (55.5%) | 0.099 |
| Baseline 24-h Holter | |||
| Mean HR (mean ± SD) | 67.7 ± 7.7 | 61.7 ± 7.5 | 0.023* |
| Minimum HR (mean ± SD) | 47.2 ± 5.7 | 42.8 ± 7.2 | 0.044* |
| AVB (1st and 2nd degree) | 3 (15.8%) | 5 (27.8%) | 0.447 |
| Supraventricular ectopic beats | 58 (10-697) | 133 (16-401) | 0.903 |
| Supraventricular tachycardia | 0 (0-1) | 0(0-1) | 0.679 |
| Ventricular ectopic beats | 851 (583-2137) | 1347 (314-2624) | 0.738 |
| Ventricular tachycardia | 0 (0-1) | 2(0-8) | 0.252 |
AVB: atrioventricular block; RBBB: right bundle branch block; LBBB: left bundle-branch block; SD: standard deviation; HR: heart rate; LAHB: left anterior hemiblock; IQ: interquartile range 1–3 (25-75%).
*
significant p value.