Abstract
Although Guyton's concept of venous return (VR) revolutionized circulatory physiology, the pulmonary circulation is invisible in its original framework. Since the pulmonary circulation is critical in left heart failure, we characterized the VR as a surface described by right (P(RA)) and left atrial (P(LA)) pressures and demonstrated that the VR surface was capable of representing mechanics of pulmonary as well as systemic circulation. However how baroreflex impacts the VR surface remains unknown. In 8 dogs, we isolated the carotid sinuses and replaced both ventricles with pumps. We varied cardiac output, shifted blood distribution between the systemic and pulmonary circulation at carotid sinus pressures (CSP) of 100 or 140 mmHg. The coefficient of determination of the VR surface ranged 0.96-0.99 indicating how flat the surface is. Increasing CSP decreased maximum VR (233 ± 27 vs. 216 ± 33 ml/kg/min, p<0.05), whereas did not change the slopes of VR along P(RA) or P(LA) axes. Baroreflex parallel shifts the VR surface, thereby stressed volume, without changing its slopes.
| Original language | English |
|---|---|
| Pages (from-to) | 4295-4296 |
| Number of pages | 2 |
| Journal | Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference |
| Publication status | Published - Jan 1 2011 |
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All Science Journal Classification (ASJC) codes
- Signal Processing
- Biomedical Engineering
- Computer Vision and Pattern Recognition
- Health Informatics
Cite this
Impact of baroreflex on venous return surface. / sakamoto, takafumi; Murayama, Yoshinori; Tanaka, Atsushi; Sakamoto, Kazuo; Tobushi, Tomoyuki; Saku, Keita; Hosokawa, Kazuya; Onitsuka, Ken; Fujino, Takeo; Sunagawa, Kenji.
In: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, 01.01.2011, p. 4295-4296.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Impact of baroreflex on venous return surface.
AU - sakamoto, takafumi
AU - Murayama, Yoshinori
AU - Tanaka, Atsushi
AU - Sakamoto, Kazuo
AU - Tobushi, Tomoyuki
AU - Saku, Keita
AU - Hosokawa, Kazuya
AU - Onitsuka, Ken
AU - Fujino, Takeo
AU - Sunagawa, Kenji
PY - 2011/1/1
Y1 - 2011/1/1
N2 - Although Guyton's concept of venous return (VR) revolutionized circulatory physiology, the pulmonary circulation is invisible in its original framework. Since the pulmonary circulation is critical in left heart failure, we characterized the VR as a surface described by right (P(RA)) and left atrial (P(LA)) pressures and demonstrated that the VR surface was capable of representing mechanics of pulmonary as well as systemic circulation. However how baroreflex impacts the VR surface remains unknown. In 8 dogs, we isolated the carotid sinuses and replaced both ventricles with pumps. We varied cardiac output, shifted blood distribution between the systemic and pulmonary circulation at carotid sinus pressures (CSP) of 100 or 140 mmHg. The coefficient of determination of the VR surface ranged 0.96-0.99 indicating how flat the surface is. Increasing CSP decreased maximum VR (233 ± 27 vs. 216 ± 33 ml/kg/min, p<0.05), whereas did not change the slopes of VR along P(RA) or P(LA) axes. Baroreflex parallel shifts the VR surface, thereby stressed volume, without changing its slopes.
AB - Although Guyton's concept of venous return (VR) revolutionized circulatory physiology, the pulmonary circulation is invisible in its original framework. Since the pulmonary circulation is critical in left heart failure, we characterized the VR as a surface described by right (P(RA)) and left atrial (P(LA)) pressures and demonstrated that the VR surface was capable of representing mechanics of pulmonary as well as systemic circulation. However how baroreflex impacts the VR surface remains unknown. In 8 dogs, we isolated the carotid sinuses and replaced both ventricles with pumps. We varied cardiac output, shifted blood distribution between the systemic and pulmonary circulation at carotid sinus pressures (CSP) of 100 or 140 mmHg. The coefficient of determination of the VR surface ranged 0.96-0.99 indicating how flat the surface is. Increasing CSP decreased maximum VR (233 ± 27 vs. 216 ± 33 ml/kg/min, p<0.05), whereas did not change the slopes of VR along P(RA) or P(LA) axes. Baroreflex parallel shifts the VR surface, thereby stressed volume, without changing its slopes.
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M3 - Article
C2 - 22255289
AN - SCOPUS:84055193985
SP - 4295
EP - 4296
JO - Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
JF - Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
SN - 1557-170X
ER -