Table 1. Subject characteristics. BMI = body mass index in kg·m2 .
| Diver | ECG system | Age years | BMI | Dives |
| Leader | No | 28 | 24 | 600 |
| Victim | No | 36 | 27 | 300 |
| A | Yes | 42 | 26 | 650 |
| B | Yes | 38 | 24 | 26 |
| C | Yes | 48 | 36 | 1,100 |
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