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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Kawada, T. Sugimachi, M. Sunagawa, K. |
| Copyright Year | 1998 |
| Description | Author affiliation: Dept. of Cardiovascular Dynamics, Nat. Cardiovascular Center Res. Inst., Japan (Kawada, T.) |
| Abstract | Complex interactions exist between the sympathetic and vagal systems in regulating heart rate. We earlier reported that activation of either one of the sympathetic and vagal nerves augments the dynamic heart rate response to concurrent stimulation of its counterpart. We attributed these interactions to the assumed sigmoidal nonlinearity between autonomic activity and heart rate. To validate this hypothesis, we stimulated the sympathetic and vagal nerves according to Gaussian white noise signals. The stimulation frequencies were chosen so that we could identify the system characteristics over the entire operating range of the heart rate regulation. A neural network analysis revealed nonlinear sigmoidal relationship between the autonomic nervous activity and heart rate. Because of this nonlinearity, we conclude that changes in sympathetic or vagal tone alone can alter the dynamic heart response to stimulation of the other nerve. These results suggest that a high frequency component of the heart rate variability appears to reflect not only vagal activity but also sympathetic activity through the interactions between the sympathetic and vagal systems. |
| Starting Page | 314 |
| Ending Page | 317 |
| File Size | 370440 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780351649 |
| ISSN | 1094687X |
| DOI | 10.1109/IEMBS.1998.745905 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1998-11-01 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Heart rate White noise Neural networks Cardiology Electrodes Protocols Resonant frequency Platinum Frequency estimation Data analysis |
| Content Type | Text |
| Resource Type | Article |
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