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Updated: Jul 6, 2026
13:07
Optical Coherence Tomography Based Biomechanical Fluid-Structure Interaction Analysis of Coronary Atherosclerosis Progression
Published on: January 15, 2022
Chaotic behavior of the coronary circulation
Jerome Trzeciakowski1, William M Chilian
1Department of Systems Biology and Translational Medicine, Texas A&M Health Science Center College of Medicine, College Station, TX, USA.
Medical & Biological Engineering & Computing
|April 4, 2008
Summary
The coronary circulation exhibits complex, non-linear dynamics. Endogenous controls like nitric oxide and purines enhance predictability, while their blockade increases chaotic flowmotion in the microcirculation.
Area of Science:
- Cardiovascular Physiology
- Non-linear Dynamics
- Microcirculation Regulation
Background:
- Coronary circulation regulation involves integrating multiple signals affecting smooth muscle cells.
- Hypothesized that signal integration leads to complex, non-linear coronary vasomotion characteristics.
Purpose of the Study:
- To investigate the non-linear characteristics of coronary vasomotion.
- To quantify the impact of nitric oxide and purinergic signaling on coronary flow dynamics.
Main Methods:
- Measured 'flowmotion,' an index of vasomotion, in canine coronary arterioles.
- Analyzed flowmotion using non-linear indices: power spectra, chaotic attractors, and Kolmogorov-Sinai entropy.
- Administered nitric oxide synthase and purinergic receptor antagonists.
Main Results:
- Baseline coronary circulation showed chaotic non-linear behavior with three principal frequencies.
- Blockade of nitric oxide synthase or purinergic receptors increased Kolmogorov-Sinai entropy.
- Antagonism altered power spectra and the chaotic attractor, indicating increased unpredictability.
Conclusions:
- Endogenous nitric oxide and purines contribute to predictable coronary circulation control.
- Blocking these pathways results in more chaotic and less predictable coronary blood flow regulation.
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