Table 2.
24-h ambulatory electrocardiogram data of the patients
| 24-h ambulatory ECG | SSYX (n = 210) | Placebo (n = 201) | Statistic value | P |
|---|---|---|---|---|
| Total VPCs, beats/24 h | ||||
| Baseline | 3683 ± 2895 | 3587 ± 2741 | 0.368* | 0.713 |
| Week 12 | 1538 ± 2187 | 2746 ± 3889 | 4.131* | <0.001 |
| Week 12 − baseline | −2145 ± 2848 | −841 ± 3411 | 4.477* | <0.001 |
| Reduction rate of total VPCs (%) | −51 ± 59 | −22 ± 82 | 4.321* | <0.001 |
| Patients with a VPC reduction percentage, n (%) | ||||
| 90% of reduction | 77 (33.2) | 50 (21.5) | 15.958† | 0.005 |
| 70% of reduction | 117 (50.4) | 75 (32.2) | 13.970† | <0.001 |
| 50% of reduction | 152 (65.5) | 101 (43.3) | 23.033† | <0.001 |
| 30% of reduction | 166 (71.6) | 125 (53.6) | 15.912† | <0.001 |
Values are given as the mean ± SD or n (%). *: t test, †: Chi-square test. SSYX: Shensong Yangxin capsules; SD: Standard deviation; ECG: Electrocardiogram; VPCs: Ventricular premature complexes; reduction rate of total VPCs = (week 12 value − baseline value)/baseline value.