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 strongly affected by cardiopulmonary influences
Interferences between baroreflex and respiration. Evaluation by symbolic analysis and conditional entropy / F. Vallais, A. Porta, D. Lucini, M. Pagani, F. Aletti, G. Baselli. - In: METHODS OF INFORMATION IN MEDICINE. - ISSN 0026-1270. - 49:5(2010), pp. 501-505. [10.3414/ME09-02-0045]
Interferences between baroreflex and respiration. Evaluation by symbolic analysis and conditional entropy
A. PortaSecondo
;D. Lucini;M. Pagani;
2010
Abstract
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 strongly affected by cardiopulmonary influencesPubblicazioni consigliate
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