Abstract
Arterial Windkessel mechanisms and arterial pressure (AP) low frequency (LF) waves were investigated by means of simple lumped models of a compliant resistant/arterial tree and of flow regulation in peripheral vascular districts (PVDs) with three types of feedback: 1) delay, 2) Van der Pol oscillator, 3) relay; all were able to actively compensate flow changes and to simulate peripheral LF vasomotion. Each PVD connected to a Windkessel compartment displayed a reduction and a disappearance of oscillations with low compliance, when the Windkessel equivalent time constant Teq fall below 2s. Two PVDs connected to the same Windkessel tended to phase opposition with a negative interference canceling their LF oscillations from AP, With a modest neural drive, cancellation was imperfect and AP waves appeared. Vasomotion, arterial compliances and neural triggers are all essential in forming LF AP variability.
Original language | English |
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Title of host publication | Computers in Cardiology |
Editors | A. Murray |
Pages | 41-44 |
Number of pages | 4 |
Volume | 30 |
Publication status | Published - 2003 |
Event | Computers in Cardiology 2003 - Thessaloniki Chalkidiki, Greece Duration: Sep 21 2003 → Sep 24 2003 |
Other
Other | Computers in Cardiology 2003 |
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Country/Territory | Greece |
City | Thessaloniki Chalkidiki |
Period | 9/21/03 → 9/24/03 |
ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine
- Software