Table 2.
Comparison of the Results of the Preexercise Holter Monitoring (HM1) in HCM Patients with TWA(+) and TWA(–)
| Variable | TWA(–) N = 42 | TWA(+) N = 46 | P‐Value |
|---|---|---|---|
| Heart rate (beats/min) | |||
| Maximal | 120 ± 15.2 | 115.6 ± 15.6 | 0.5 |
| Minimal | 46.4 ± 7.3 | 45.5 ± 5.8 | 0.7 |
| Mean | 67.4 ± 8.5 | 65.5 ± 6.7 | 0.3 |
| The number of PVB | 1048.5 ± 116.5 | 1491.8 ± 127.5 | 0.09 |
| Patients with nVT episodes | 5 (11.9%) | 25 (54.3%) | <0.001 |
| SD (ms) | 124.4 ± 25.7 | 126.3 ± 30 | 0.8 |
| LF (ms2) | 441.1 ± 120.7 | 462.8 ± 125.1 | 0.4 |
| HF (ms2) | 215.3 ± 93.4 | 203.5 ± 94.3 | 0.8 |
| TS ms/RR | 3.5 ± 1.4 | 3.2 ± 1.1 | 0.6 |
| TO (%) | −0.8 ± 1.7 | −0.7 ± 1.4 | 0.9 |
| QTc (ms) | 432 ± 20.1 | 475.4 ± 36.8 | <0.001 |
| Patients with LP | 9 (21.4%) | 19 (41.3%) | 0.05 |
HF = high‐frequency power spectrum; LF = low‐frequency power spectrum; LP = ventricular late potentials; NVT = nonsustained ventricular tachycardia (preexercise); PVB = premature ventricular beat; QTc = corrected QT interval; SD = standard deviation; TO = turbulence onset; TS = turbulence slope.