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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Oz, O. Eliash, S. Cohen, S. Akselrod, S. |
| Copyright Year | 1989 |
| Description | Author affiliation: Tel-Aviv Univ., Israel (Oz, O.; Eliash, S.; Cohen, S.; Akselrod, S.) |
| Abstract | This study is based on the hypothesis that the development of essential hypertension is due to a defect in cardiovascular control. Young, prehypertensive, spontaneously hypertensive (SHR) rats were compared with normotensive Wistar Kyoto (WKY) rats. Spectral analysis of blood pressure (ABP) fluctuations previously demonstrated that baseline low-frequency fluctuations (0.04-0.1 Hz) are reduced in the SHR rats even before they develop hypertension. In the present study, 20-min-long ABP traces were sampled with the focus on frequencies as low as 0.004 Hz. The effect caused by a perturbation in blood pressure was investigated in young SHR versus WKY rats. A sudden drop in blood volume (2-ml bleeding) caused a clear increase in low-frequency ABP fluctuations, more pronounced in SHR than in WKY rats. The decrease in mean ABP was larger in SHR (-42%) than in WKY rats (-21%). Alpha/sub 1/-blockade (prazosin) affected the reaction of both species to bleeding differently. The results indicate that the SHR rats exhibit an abnormal nervous response ( alpha -sympathetic) to a drop in blood pressure, which might be at the basis of the development of hypertension.< |
| Starting Page | 61 |
| Ending Page | 64 |
| File Size | 401719 |
| Page Count | 4 |
| File Format | |
| ISBN | 0818621141 |
| DOI | 10.1109/CIC.1989.130481 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1989-09-19 |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Frequency Blood pressure Fluctuations Hypertension Rats Capacitive sensors Hemorrhaging Animals Spectral analysis Sampling methods |
| Content Type | Text |
| Resource Type | Article |
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