Table 2.
Twelve-lead resting ECG data of atrial electrical remodelling, collected before and after the race, in master athletes running an ultramarathon.
| Variables | Pre-Race | Post-Race | p Value |
|---|---|---|---|
| Resting heart rate, bpm | 61 ± 8 | 85 ± 14 | <0.0001 |
| PR interval, ms | 157 ± 24 | 156 ± 20 | 0.49 |
| P wave voltage, mV | 0.16 ± 0.05 | 0.20 ± 0.0.6 | <0.0001 |
| P wave duration, ms | 98 ± 17 | 103 ± 16 | 0.094 |
| RA enlargement, n (%) | 5 (7.4) | 15 (22) | <0.0001 |
| LA enlargement, n (%) | 22 (32.4) | 23 (33.8) | 0.66 |
RA, right atrial; LA, left atrial. n (%): number of athletes, %: percentage of athletes.