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Synchronization and modulation in the human cardiorespiratory system

Research output: Contribution to journalJournal article


Journal publication date15/08/2000
JournalPhysica A: Statistical Mechanics and its Applications
Number of pages11
Original languageEnglish


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.