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International Conference on Complex Systems (ICCS2006)

Comparison of chaotic biomagnetic field patterns recorded from the arrhythmic cardiac and GI systems

Andrei Irimia
Department of physics and astronomy, Vanderbilt University

Michael Gallucci
Department of surgery, Vanderbilt University School of Medicine

John Wikswo
Department of physics and astronomy, Vanderbilt University

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     Last modified: August 8, 2006

We here investigate the time evolution of normal and arrythmic cardiac and gastric biomagnetic signals using simultaneous magnetocardiography (MCG) and magnetogastrography (MGG). Noninvasive MCG/MGG recordings were acquired from ten anesthetized domestic pigs in the control (healthy) state. Thereafter, gastric arrhythmia was induced via surgical stomach division, which disrupted the natural periodicity of the gastric musculature activation cycle. After recording biomagnetic data in this state for one hour, cardiac arrythmia was induced in each anesthetized pig, which allowed us to compare
cardiac and gastric arrhythmia within the framework of an intra-subject animal model. Signal analysis revealed that several features are shared by cardiac and gastric arrhythmias, particularly with respect to the chaos content of the magnetic signal from each organ before and after the onset of pathophysiology. Our findings indicate that chaos phenomena in the gut-which have been investigated only recently-may be similar to those in the heart, which are better understood.

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