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Updated: Jun 11, 2026

Implantation of Combined Telemetric ECG and Blood Pressure Transmitters to Determine Spontaneous Baroreflex Sensitivity in Conscious Mice
Published on: February 14, 2021
Interferences between baroreflex and respiration. Evaluation by symbolic analysis and conditional entropy
1Dipartimento di Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy.
Cardiopulmonary reflexes significantly influence baroreflex control of heart rate during exercise. This interaction affects how we measure baroreflex function using spontaneous variability.
Area of Science:
- Cardiovascular autonomic control
- Human physiology
- Exercise physiology
Background:
- The baroreflex is a critical short-term regulator of cardiovascular function.
- Interactions between baroreflex and cardiopulmonary reflexes are vital for heart rate control.
Purpose of the Study:
- To investigate the coupling between the baroreflex and respiration during mild dynamical exercise.
- To understand how respiratory influences affect baroreflex activity.
Main Methods:
- Symbolic analysis was employed to assess baroreflex-respiration coupling.
- Conditional entropy was used to quantify the interdependence between these physiological signals.
Main Results:
- A close relationship was observed between baroreflex sequences and the respiratory signal phase.
- Findings indicate significant interference between baroreflex and cardiopulmonary reflexes during exercise.
Conclusions:
- Measures of baroreflex function derived from spontaneous variability are substantially impacted by cardiopulmonary influences.
- Understanding these interactions is crucial for accurate assessment of cardiovascular autonomic control.
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