Table 3.
Ambulatory ECG monitoring data obtained the day before the race and during the entire duration of the race. Data obtained at rest and during the race were reported separately.
| Variables | |
|---|---|
| Min HR, bpm | 41 (38–45) |
| Max HR, bpm | 172 (161–182) |
| Max Theoretical HR, % | 98 (91–105) |
| Number of PABs/24 h, n ^ | 7 (3–19) |
| ≥1 PAB(s)/24 h, n (%) | 57 (97%) |
| ≥100 PABs/24 h, n (%) | 5 (8%) |
| ≥1 PAB(s) during the Race, n (%) | 13 (22%) |
| Exercise-Induced PABs *, n (%) | 1 (2%) |
| ≥1 Couplet(s), n (%) | 12 (21%) |
| ≥1 Couplet(s) during the Race, n (%) | 2 (4%) |
| ≥1 Triplet(s), n (%) | 10 (17%) |
| ≥1 Triplet(s) during the Race, n (%) | 1 (2%) |
| ≥1 Non-Sustained SVT(s), n (%) | 11 (19%) |
| ≥1 Non-Sustained SVT(s) during the Race, n (%) | 0 |
HR: heart rate; PAB: premature atrial beat; SVT: supraventricular tachycardia. ^ n in this case means median number of PABs in one day. * Occurrence of PABs only during exercise or an increase in the burden of PABs/hour. n: number of athletes.