Table 3.
Comparison of the Results of the Postexercise Holter Monitoring (HM2) in HCM Patients with TWA(+) and TWA(–)
| Variable | TWA(–) | TWA(+) | P‐Value |
|---|---|---|---|
| The number of PVB | 908.6 ± 217.3 | 1597.2 ± 532.4 | 0.07 |
| Patients with nVT episodes | 3 (7.1%) | 31 (67.4%) | <0.001 |
| SD (ms) | 121.8 ± 31.4 | 128.1 ± 27.3 | 0.7 |
| LF (ms2) | 468.1 ± 147.2 | 484.3 ± 156.3 | 0.5 |
| HF (ms2) | 221.3 ± 88.4 | 236.2 ± 87.2 | 0.8 |
| TS ms/RR | 3.8 ± 1.6 | 4.1 ± 2.0 | 0.7 |
| TO (%) | −0.9 ± 2.2 | −0.8 ± 1.8 | 0.8 |
| QTc (ms) | 440.9 ± 32.2 | 470.5 ± 46.2 | <0.001 |
| Patients with LP | 8 (19.0%) | 17 (37%) | 0.05 |
HF = high‐frequency power spectrum; LF = low‐frequency power spectrum; LP = ventricular late potentials; NVT = nonsustained ventricular tachycardia (postexercise); PVB = premature ventricular beat; QTc = corrected QT interval; SD = standard deviation; TO = turbulence onset; TS = turbulence slope.