Chaos Detection in Ventricular Wall Thickness Pulsatility

Legnani, Walter; Cymberknop, Leandro J.; Alfonso, M. R.; Pessana, Franco; Armentano, Ricardo L.

doi:10.1007/978-3-319-13117-7_13

Cited by 1 publication

(1 citation statement)

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“…Subsequently, chaotic metrics were applied to VWT pulsatility in Ref. 6, where a non-linear analysis was carried out under baseline conditions through the phase space reconstruction, determinism evaluation, and largest Lyapunov exponent assessment of the time series. It was concluded that the nonlinear system characterization of VWT behavior could be related to a chaotic process.…”

Section: Introductionmentioning

confidence: 99%

Analysis of ischaemic crisis using the informational causal entropy-complexity plane

Legnani

Traversaro

Redelico

et al. 2018

Chaos: An Interdisciplinary Journal of Nonlinear Science

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In the present work, an ischaemic process, mainly focused on the reperfusion stage, is studied using the informational causal entropy-complexity plane. Ischaemic wall behavior under this condition was analyzed through wall thickness and ventricular pressure variations, acquired during an obstructive flow maneuver performed on left coronary arteries of surgically instrumented animals. Basically, the induction of ischaemia depends on the temporary occlusion of left circumflex coronary artery (which supplies blood to the posterior left ventricular wall) that lasts for a few seconds. Normal perfusion of the wall was then reestablished while the anterior ventricular wall remained adequately perfused during the entire maneuver. The obtained results showed that system dynamics could be effectively described by entropy-complexity loops, in both abnormally and well perfused walls. These results could contribute to making an objective indicator of the recovery heart tissues after an ischaemic process, in a way to quantify the restoration of myocardial behavior after the supply of oxygen to the ventricular wall was suppressed for a brief period.

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Section: Introductionmentioning

confidence: 99%