Table 3.
Heart rate, RR interval, and electrical axis of neonatal lambs
| Age (days) | Body weight (Kg) | BSA (m2) | Heart rate (bpm) | RR interval (ms) | Axis |
|---|---|---|---|---|---|
| Birth | 3.88 ± 0.88a | 0.0025 ± 0.00037a | 191.95 ± 42.17a* | 334.86 ± 69.15a | 29.63 ± 108.50° |
| (2.40–5.60) | (0.0018–0.0032) | (193–160) | (490–230) | ||
| 7 | 5.30 ± 1.31b | 0.0030 ± 0.00050b | 214.95 ± 54.58b | 297.04 ± 69.12a | 5.31 ± 110.39° |
| (3.00–7.60) | (0.0021–0.0039) | (305–122) | (413–197) | ||
| 14 | 6.84 ± 1.78c | 0.0036 ± 0.00062c | 195.50 ± 37.74ab | 305.90 ± 57.22a | −18.86 ± 115.31° |
| (3.40–10.00) | (0.0022–0.0047) | (260–108) | (480–223) | ||
| 21 | 8.17 ± 2.05d | 0.0041 ± 0.00067d | 173.04 ± 30.72c | 361.18 ± 56.17d | −8.45 ± 113.61° |
| (4.60–12.00) | (0.0028–0.0053) | (250–110) | (467–270) | ||
| 28 | 9.50 ± 2.45e | 0.0045 ± 0.00077e | 158.81 ± 22.14cd | 379.81 ± 44.88b | −37.77 ± 113.36° |
| (5.55 ± 13.20) | (0.0031–0.0056) | (211–116) | (467–320) | ||
| 35 | 10.78 ± 2.91f | 0.0049 ± 0.00088f | 145.63 ± 37.80d | 441.63 ± 115.28c | −29.63 ± 117.39° |
| (5.50 ± 15.10) | (0.0031–0.0062) | (260–92) | (230–423) |
(*) Superscript letters in the same column are significantly different (P < 0.05) between time points (days of age). Values are expressed as mean ± SD. BSA: body superface area