Heart rate variability indices
| HCM patients | Healthy controls | p Value | |
|---|---|---|---|
| HCM, hypertrophic cardiomyopathy; LF, low frequency component; PNN50, percentage of differences between adjacent RR intervals >50 ms; SD, standard deviation of all RR intervals. | |||
| SD (ms) | 130 (40) | 170 (43) | 0.03 |
| PNN50 (%) | 21 (13) | 32 (12) | 0.05 |
| LF (ms2) | 1027 (900) | 1862 (1400) | 0.03 |