Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Reconstructing cardiovascular dynamics
AU - Stefanovska, Aneta
AU - Bračič, Maja
PY - 1999/2/1
Y1 - 1999/2/1
N2 - The signals that originate from the human cardiovascular system were analysed using methods of both linear and nonlinear system theory. The analyses in the time domain and in the phase space revealed the deterministic and almost conservative nature of the cardiovascular control system on the time scale of minutes. Five characteristic frequencies were found in the signal of peripheral blood flow. Some of them had already been found in other cardiovascular functions, the breathing, blood pressure, ECG and HRV. Each characteristic peak reflects the periodic action of one of the subsystems, involved in the regulation of the blood flow. These systems are mutually dependent, via the couplings among them. Their strength plays an essential role in the performance of the system. In some cases their importance is indicated, thus pointing to practical applications in the diagnosis and prediction of cardiovascular functions.
AB - The signals that originate from the human cardiovascular system were analysed using methods of both linear and nonlinear system theory. The analyses in the time domain and in the phase space revealed the deterministic and almost conservative nature of the cardiovascular control system on the time scale of minutes. Five characteristic frequencies were found in the signal of peripheral blood flow. Some of them had already been found in other cardiovascular functions, the breathing, blood pressure, ECG and HRV. Each characteristic peak reflects the periodic action of one of the subsystems, involved in the regulation of the blood flow. These systems are mutually dependent, via the couplings among them. Their strength plays an essential role in the performance of the system. In some cases their importance is indicated, thus pointing to practical applications in the diagnosis and prediction of cardiovascular functions.
KW - Biological systems
KW - Flow
KW - Nonlinear analysis
KW - Nonlinear control systems
KW - Nonlinear models
KW - Waves
U2 - 10.1016/S0967-0661(98)00185-3
DO - 10.1016/S0967-0661(98)00185-3
M3 - Journal article
AN - SCOPUS:0033075281
VL - 7
SP - 161
EP - 172
JO - Control Engineering Practice
JF - Control Engineering Practice
SN - 0967-0661
IS - 2
ER -