Interferences between baroreflex and respiration: Evaluation by symbolic analysis and conditional entropy

F. Vallais, A. Porta, D. Lucini, M. Pagani, F. Aletti, G. Baselli

Research output: Contribution to journalArticle


Background: The baroreflex is one of the most important short-term cardiovascular autonomic control mechanisms. Its interactions with other reflexes, mainly cardiopulmonary reflexes, are of paramount importance in controlling heart rate. Objectives: This study assesses the coupling between baroreflex and respiration during a progressive bicycle mild dynamical exercise. Methods: The coupling was assessed by symbolic analysis and conditional entropy. Results: Findings suggested the close relationship between the baroreflex sequences and the phase of respiratory signal and, thus, the interference between baroreflex and cardiopulmonary reflexes. Conclusions: Indexes describing baroreflex based on spontaneous variability are strong - ly affected by cardiopulmonary influences.

Original languageEnglish
Pages (from-to)501-505
Number of pages5
JournalMethods of Information in Medicine
Issue number5
Publication statusPublished - 2010



  • Baroreflex
  • Cardiopulmonary reflexes
  • Conditional entropy
  • Symbolic analysis

ASJC Scopus subject areas

  • Health Informatics
  • Health Information Management
  • Advanced and Specialised Nursing

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