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• W2117759780 abstract "The hemodynamic inverse problem is the determination of arterial system properties from pressures and flows measured at the entrance of an arterial system. Conventionally, investigators fit reduced arterial system models to data, and the resulting model parameters represent putative arterial properties. However, no unique solution to the inverse problem exists-an infinite number of arterial system topologies result in the same input impedance (Z/sub in/) and, therefore, the same pressure and flow. Nevertheless, there are exceptions to this theoretical limitation; total peripheral resistance (R/sub tot/), total arterial compliance (C/sub tot/), and characteristic impedance (Z/sub o/) can be uniquely determined from input pressure and flow. Z/sub in/ is determined completely by C/sub tot/ and R/sub tot/ at low frequencies, Z/sub o/ at high frequencies, and arterial topology and reflection effects at intermediate frequencies. We present a novel method to determine the relative contribution of Z/sub o/, C/sub tot/, R/sub tot/ and arterial topology/reflection to Z/sub in/ without assuming a particular reduced model. This method is tested with a large-scale distributed model of the arterial system, and is applied to illustrative cases of measured pressure and flow. This work, thus, lays the theoretical foundation for determining the arterial properties responsible for increased pulse pressure with age and various arterial system pathologies." @default.
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• W2117759780 date "2006-03-01" @default.
• W2117759780 modified "2023-09-23" @default.
• W2117759780 title "Resolving the Hemodynamic Inverse Problem" @default.
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• W2117759780 doi "https://doi.org/10.1109/tbme.2005.869664" @default.
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