Data di Pubblicazione:
2002
Citazione:
Simulating the interactions among vasomotion waves of peripheral vascular districts / G. Baselli, A. Porta. - In: COMPUTERS IN CARDIOLOGY. - ISSN 0276-6574. - 29(2002), pp. 49-52.
Abstract:
Simulations are performed in order to analyze the tendency of oscillating peripheral vascular districts (PVDs) to maintain equal phases thus inducing low frequency (LF) waves in systemic arterial pressure (AP). A PVD model regulating the local flow by means of a delayed non-linear feedback displayed spontaneous oscillations with a 12 sec period in the pressure range (40-150 mmHg) of active flow compensation. Two identical PVDs loading the same windkessel compartment could oscillate in phase inducing significant (10% of mean) AP waves: however, this behavior was unstable. On the contrary, phase opposition (without AP waves) was stable and corresponded to an energetic minimum (-9 % compared to the unstable solution). The introduction of either baroreflex mechanisms or a central drive was able to steadily align the PVD phases. Vasomotion synchronization can be a powerful modulation mechanism of LF waves in systemic AP.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
G. Baselli, A. Porta
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