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. 2020 Jan 29;10:1410. doi: 10.1038/s41598-020-58367-y

Figure 1.

Figure 1

Circulatory system model consisting of circulatory dynamics model and circulatory control inverse model. (a) Circulatory dynamics model consisting of eight elastic containers (circles) representing left atrial (1), left ventricle (2), systemic arteries (3), systemic veins (4), right atrial (5), right ventricle (6), pulmonary arteries (7), and pulmonary veins (8); and eight liner resistors (line segments) connecting these containers. (b) Variation of ventricular volume by the reference23(green), and those at zero pressure, or no-load ventricular volumes, derived from the reference values for left ventricle (red) and right ventricle (blue). (c) Block diagram of circulatory control inverse model with input of pulse rate b(t) and outputs of peripheral vascular resistance of systemic and pulmonary arteries, R4(t) and R8(t), and no-load ventricular volumes, V2(t) and V6(t).