Table 1.
Frequency distribution of arrhythmias during rest and exercise
| Rest | Exercise | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Horse | Age (years) | Sex | Recording duration (hours) | Sinoatrial block | Sinus arrest | 2nd degree AV block | SVPC | VPC | Recording duration (hours) | SVPC |
| 1 | 11 | G | 24.0 | 1 | 0 | 0 | 0 | 0 | 1.6 | 0 |
| 2 | 14 | G | 23.3 | 0 | 0 | 0 | 6 | 0 | 1.6 | 1 |
| 3 | 9 | G | 22.9 | 0 | 0 | 211 | 7 | 0 | N/A | N/A |
| 4 | 15 | S | N/A | N/A | N/A | N/A | N/A | N/A | 1.3 | 5 |
| 5 | 8 | G | 24.0 | 0 | 0 | 1 | 0 | 0 | 1.4 | 1 |
| 6 | 8 | G | 24.0 | 7 | 0 | 3 | 4 | 0 | 1.8 | 2 |
| 7 | 15 | G | 24.0 | 0 | 0 | 0 | 86a | 2 | 1.6 | 24 |
| 8 | 8 | S | 22.1 | 0 | 0 | 0 | 2 | 0 | 1.6 | 0 |
| 9 | 13 | G | 24.0 | 13 | 1 | 42 | 69 | 0 | 1.4 | 1 |
| 10 | 9 | M | 24.0 | 1 | 0 | 3 | 7 | 0 | 1.5 | 0 |
| 11 | 11 | G | 24.0 | 0 | 0 | 0 | 0 | 0 | 1.7 | 0 |
G gelding, M mare, S stallion. SVPC supraventricular premature complex, VPC ventricular premature complex. N/A not available. aIncluding three episodes of double SVPCs and one triple SVPC