Long-term dynamics of blood pressure in intact and sympathectomized post-suspension rats

被引：0

作者：

Borovik, A ^{[1
]}

Tarasova, O ^{[1
]}

Figourina, I ^{[1
]}

Golubinskaya, V ^{[1
]}

Vinogradova, O ^{[1
]}

机构：

[1] Space Biomed Ctr Training & Res, Moscow 117192, Russia

来源：

PROCEEDINGS OF THE EUROPEAN SYMPOSIUM ON LIFE IN SPACE FOR LIFE ON EARTH | 2002年 / 501卷

关键词：

D O I：

暂无

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

Low-frequency dynamics of mean arterial pressure (MAP) and pulse interval (PI) was studied in intact and sympathectomized rats after 2-week tail suspension. Correlation properties of long-term (f<0.8 Hz) MAP fluctuations were analyzed using R/S Hurst method. It was shown that time series of successive increments in MAP level display power-law fractal anticorrelations in wide range of time scales. After sympathectomy and/or suspension averaged Hurst exponents were more close to the value for uncorrelated random process (H=0.5), indicating deterioration of regulatory feedbacks. Besides, a decrease of coherence between MAP and PI in low-frequency range was observed after suspension in both intact and sympathectomized rats, indicating alteration of non-sympathetic cardiovascular control mechanisms.

引用

页码：213 / 214

页数：2

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