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Synchronization and modulation in the human cardiorespiratory system

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<mark>Journal publication date</mark>15/08/2000
<mark>Journal</mark>Physica A: Statistical Mechanics and its Applications
Issue number3-4
Volume283
Number of pages11
Pages (from-to)451-461
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

We analyse phase and frequency synchronization in the human cardio-respiratory system. The method for analysis of noisy nonstationary bivariate data is applied to simultaneously measured cardiac and respiratory activity. Short epochs of phase and/or frequency locking between respiratory and cardiac rhythms are detected in healthy relaxed subjects (non-athletes). We reveal that the strength of phase synchronization is inversely related to the extent of respiratory modulation of the heart rate.