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.
- Cardiopulmonary reflexes
- Conditional entropy
- Symbolic analysis
ASJC Scopus subject areas
- Health Informatics
- Health Information Management
- Advanced and Specialised Nursing