Low-order chaos in sympathetic nerve activity and scaling of heartbeat intervals
The mechanism of 1/f scaling of heartbeat intervals remains unknown. We recorded heartbeat intervals, sympathetic nerve activity, and blood pressure in conscious rats with normal or high blood pressure. Using nonlinear analyses, we demonstrate that the dynamics of this system of three variables is l...
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| Veröffentlicht in: | Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics Statistical physics, plasmas, fluids, and related interdisciplinary topics, 2003-04, Vol.67 (4 Pt 1), p.041915-041915, Article 041915 |
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| container_end_page | 041915 |
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| container_issue | 4 Pt 1 |
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| container_title | Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics |
| container_volume | 67 |
| creator | Osaka, Motohisa Kumagai, Hiroo Sakata, Katsufumi Onami, Toshiko Chon, Ki H Watanabe, Mari A Saruta, Takao |
| description | The mechanism of 1/f scaling of heartbeat intervals remains unknown. We recorded heartbeat intervals, sympathetic nerve activity, and blood pressure in conscious rats with normal or high blood pressure. Using nonlinear analyses, we demonstrate that the dynamics of this system of three variables is low-order chaos, and that sympathetic nerve activity leads to heartbeat interval and blood pressure changes. It is suggested that impaired regulation of blood pressure by sympathetic nerve activity is likely to cause experimentally observable steeper scaling of heartbeat intervals in hypertensive (high blood pressure) rats. |
| doi_str_mv | 10.1103/physreve.67.041915 |
| format | Article |
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We recorded heartbeat intervals, sympathetic nerve activity, and blood pressure in conscious rats with normal or high blood pressure. Using nonlinear analyses, we demonstrate that the dynamics of this system of three variables is low-order chaos, and that sympathetic nerve activity leads to heartbeat interval and blood pressure changes. 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It is suggested that impaired regulation of blood pressure by sympathetic nerve activity is likely to cause experimentally observable steeper scaling of heartbeat intervals in hypertensive (high blood pressure) rats.</description><subject>Algorithms</subject><subject>Animals</subject><subject>Blood Pressure</subject><subject>Heart - physiology</subject><subject>Models, Theoretical</subject><subject>Nonlinear Dynamics</subject><subject>Rats</subject><subject>Rats, Inbred SHR</subject><subject>Sympathetic Nervous System - physiology</subject><subject>Time Factors</subject><issn>1539-3755</issn><issn>1063-651X</issn><issn>1095-3787</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkEtLxDAcxIMorq5-AQ-Sk7euSdM8epRlfcCCi-g5pO0_ttKXSbbSb29kFzzNHGYG5ofQDSUrSgm7H-vZO5hgJeSKZDSn_ARdUJLzhEklT6PnLI-e8wW69P6LEJYylZ2jBU2lEhnJLtBuO_wkg6vA4bI2g8dNj_3cjSbUEJoS9-AmwKYMzdSEGZu-wr40bdN_4sHiGowLBZgQayEmTeuv0JmNAtdHXaKPx837-jnZvj69rB-2SZkxHhKgwIkxVWZTmxKgCmRhaSUoURVRaS7ihVRJVVmR29JCAVme5rLiBbFCWsGW6O6wO7rhew8-6K7xJbSt6WHYey0ZE5RnKgbTQ7B0g4-8rB5d0xk3a0r0H0e9ixzfYNpoIfWBYyzdHtf3RQfVf-UIjv0CU2txmA</recordid><startdate>20030401</startdate><enddate>20030401</enddate><creator>Osaka, Motohisa</creator><creator>Kumagai, Hiroo</creator><creator>Sakata, Katsufumi</creator><creator>Onami, Toshiko</creator><creator>Chon, Ki H</creator><creator>Watanabe, Mari A</creator><creator>Saruta, Takao</creator><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20030401</creationdate><title>Low-order chaos in sympathetic nerve activity and scaling of heartbeat intervals</title><author>Osaka, Motohisa ; Kumagai, Hiroo ; Sakata, Katsufumi ; Onami, Toshiko ; Chon, Ki H ; Watanabe, Mari A ; Saruta, Takao</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c435t-e1e50aad4f2f20e18e7bf1d6108d082963782878df69fcfebe49297d5b0f67f63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Algorithms</topic><topic>Animals</topic><topic>Blood Pressure</topic><topic>Heart - physiology</topic><topic>Models, Theoretical</topic><topic>Nonlinear Dynamics</topic><topic>Rats</topic><topic>Rats, Inbred SHR</topic><topic>Sympathetic Nervous System - physiology</topic><topic>Time Factors</topic><toplevel>online_resources</toplevel><creatorcontrib>Osaka, Motohisa</creatorcontrib><creatorcontrib>Kumagai, Hiroo</creatorcontrib><creatorcontrib>Sakata, Katsufumi</creatorcontrib><creatorcontrib>Onami, Toshiko</creatorcontrib><creatorcontrib>Chon, Ki H</creatorcontrib><creatorcontrib>Watanabe, Mari A</creatorcontrib><creatorcontrib>Saruta, Takao</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Physical review. 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E, Statistical physics, plasmas, fluids, and related interdisciplinary topics</jtitle><addtitle>Phys Rev E Stat Nonlin Soft Matter Phys</addtitle><date>2003-04-01</date><risdate>2003</risdate><volume>67</volume><issue>4 Pt 1</issue><spage>041915</spage><epage>041915</epage><pages>041915-041915</pages><artnum>041915</artnum><issn>1539-3755</issn><issn>1063-651X</issn><eissn>1095-3787</eissn><abstract>The mechanism of 1/f scaling of heartbeat intervals remains unknown. We recorded heartbeat intervals, sympathetic nerve activity, and blood pressure in conscious rats with normal or high blood pressure. Using nonlinear analyses, we demonstrate that the dynamics of this system of three variables is low-order chaos, and that sympathetic nerve activity leads to heartbeat interval and blood pressure changes. 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| ispartof | Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 2003-04, Vol.67 (4 Pt 1), p.041915-041915, Article 041915 |
| issn | 1539-3755 1063-651X 1095-3787 |
| language | eng |
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| source | MEDLINE; American Physical Society Journals |
| subjects | Algorithms Animals Blood Pressure Heart - physiology Models, Theoretical Nonlinear Dynamics Rats Rats, Inbred SHR Sympathetic Nervous System - physiology Time Factors |
| title | Low-order chaos in sympathetic nerve activity and scaling of heartbeat intervals |
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