Table 1 The value and definition of system parameters
From: Sensitivity analysis of dynamic biological systems with time-delays
Parameter | Definition | Value |
|---|---|---|
h 0 | Uncontrolled heart rate | 100 bpm |
p 0 | Mean arterial blood pressure | 100 mm Hg |
α | Sympathetic effect on peripheral resistance | 15 |
β | Sympathetic control of heart rate | 10 |
ν | Strength of vagal tone | 9.63 |
δ | Relaxation time | 0.8 s-1 |
γ | Damping effect of vagal activity on the sympathetic tone | 0.2 |
μ | 3/(2 + α) | 0.18 |
A 1 | Amplitude of the influence of respiration on blood pressure | 0 |
A 2 | Amplitude of the influence of respiration on heart rate | 0.003 |
f r | Breathing rate | 0.17 Hz |
Ï„ | Sympathetic time delay | 3 s |
Ï• | Phase lag | 3.14 s |
n | Hill exponent | 8 |
ε h | Relative coefficient for heart rate | 1 |
ε p | Relative coefficient for blood pressure | 3 |