Baroreflex sensitivity values in the preterm and term neonates (values are mean (SD))
| No of measurements | Sp-BRS (ms/mm Hg) | r | Δ RR (seconds) | Δ SBP (mm Hg) | |
|---|---|---|---|---|---|
| Preterm (n=14): | |||||
| Total | 42 | 4.07 (2.19) | 0.86 (0.05) | ||
| +Δ RR/+Δ SBP | 19 | 3.96 (2.50) | 0.83 (0.03) | 0.04 (0.02) | 9.16 (4.20) |
| −Δ RR/−Δ SBP | 23 | 4.15 (1.97) | 0.88 (0.05) | −0.04 (0.02) | −9.17 (5.15) |
| Term (n=5): | |||||
| Total | 15 | 10.23 (2.92)2-150 | 0.86 (0.06) | ||
| +Δ RR/+Δ SBP | 7 | 10.51 (3.08)2-150 | 0.85 (0.06) | 0.125 (0.20) | 5.90 (6.43) |
| −Δ RR/−Δ SBP | 8 | 10.32 (2.95)2-150 | 0.84 (0.08) | −0.041 (0.021) | −3.75 (2.30) |
↵2-150 P < 0.001 vs preterm.
Sp-BRS: spontaneous baroreflex sensitivity; r: correlation coefficient; Δ RR: variations in heart rate; Δ SBP: variations in systolic blood pressure; +Δ RR/+Δ SBP: episode of brachycardia/hypertension; −Δ RR/− SBP: episode of tachycardia/hypotension.