Features of the baroreflex at different developmental ages
| Age . | Type . | G50 (beats kPa min−1) . | G50,norm (no units) . | Resting P̄a (kPa) . | P̄aG50 (kPa) . |
|---|---|---|---|---|---|
| 70% | Hypertensive | 20.25 | 0.33 | 1.24 | - |
| 80% | Hypertensive | 41.22 | 0.69 | 1.49 | - |
| 90% | Hypertensive | 12.54 | 0.29 | 2.01 | - |
| 1 week | Complete | 11.46 | 0.75 | 2.87 | 2.34 |
| 1 year | Complete | 9.69 | 2.12 | 4.3 | 4.06 |
| Age . | Type . | G50 (beats kPa min−1) . | G50,norm (no units) . | Resting P̄a (kPa) . | P̄aG50 (kPa) . |
|---|---|---|---|---|---|
| 70% | Hypertensive | 20.25 | 0.33 | 1.24 | - |
| 80% | Hypertensive | 41.22 | 0.69 | 1.49 | - |
| 90% | Hypertensive | 12.54 | 0.29 | 2.01 | - |
| 1 week | Complete | 11.46 | 0.75 | 2.87 | 2.34 |
| 1 year | Complete | 9.69 | 2.12 | 4.3 | 4.06 |
Type indicates whether the baroreflex was active when pressure was increased (hypertensive) or when pressure was increased and decreased(complete). G50, maximal baroreflex gain; G50,norm, normalized maximal baroreflex gain; resting P̄a, resting mean arterial pressure; P̄aG50, mean arterial pressure at G50. P̄aG50 could not be calculated in embryos because the data were not ditted to a sigmoidal baroreflex model. See Materials and methods for further details.