Specific examination and ECG measurements
| Measurement | Student-athletes | Adolescents with HCM | p Value |
|---|---|---|---|
| Heart rate (bpm) | 63±10 | 66±12 | 0.016 |
| Systolic BP (mm Hg) | 111±14 | 126±13 | <0.0001 |
| PR interval (ms) | 154±2 | 146±2 | 0.005 |
| QRS Duration (ms) | 92±9 | 106±19 | <0.0001 |
| S-Wave V1 (mm) | 12±6 | 22±13 | <0.0001 |
| R-Wave V1 (mm) | 4±3 | 6±7 | <0.01 |
| S-Wave V5 (mm) | 4±3 | 7±7 | <0.0001 |
| R-Wave V5 (mm) | 21±1 | 19±1 | 0.90 |
| S-Wave V6 (mm) | 2±2 | 4±6 | 0.0006 |
| R-Wave V6 (mm) | 17±1 | 17±1 | 0.70 |
| Q-Wave III (mm) | 1.0±1.0 | 2.5±5.4 | <0.001 |
| Q-Wave V6 (mm) | 0.9±0.9 | 1.2±1.8 | 0.054 |
| R-Wave III (mm) | 10.4±0.6 | 11.5±9.1 | 0.11 |
| Total V3 (mm) | 22±8 | 37±16 | <0.0001 |
| Total V4 (mm) | 27±11 | 34±15 | <0.0001 |
| QTc>99th centile | 0/147 (1%) | 21/148 (14%) | <0.0001 |
HCM, hypertrophic cardiomyopathy.