Abstract
A descriptive incremental nonlinear single-input-multiple-output (SIMO) model of the hemodynamic response [cardiac output (CO) and mean aortic pressure (MAP)] to the inotropic drug dopamine in acute ischemic heart failure was constructed to facilitate the design of closed-loop control systems. The structure of the CO component of the model is a first-order system with a sigmoidal relationship. The MAP component is a first-order system with a threshold. Parameter identification was performed on data collected during positive step (drug on) and negative step (drug off) testing using multiple levels (2-6 mcg/kg/min) of infusion of dopamine in a canine model of acute ischemic heart failure. Parameter estimation utilized a least squares objective function and a linearized form of the step response of the model in the time domain. The model provides good approximations to the mean empirical responses.
Original language | English (US) |
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Pages (from-to) | 267-272 |
Number of pages | 6 |
Journal | IEEE Transactions on Biomedical Engineering |
Volume | 38 |
Issue number | 3 |
DOIs | |
State | Published - Mar 1991 |
ASJC Scopus subject areas
- Biomedical Engineering