Document Detail

Frequency shift in baroregulatory oscillation in borderline hypertensive subjects.
MedLine Citation:
PMID:  9160759     Owner:  NLM     Status:  MEDLINE    
The aim of this study was to quantify the frequency shift in vasomotor oscillations in blood pressure we observed in borderline hypertensive individuals in our previous study. Electrocardiogram and intraarterial blood pressure were recorded in 33 normotensive, 29 borderline hypertensive, and 33 mildly hypertensive men (aged 35 to 45 years). Five-minute stationary periods in supine, sitting, and standing positions, and during sleep were extracted from the recordings for autoregressive frequency domain analysis. In borderline hypertensive subjects vasomotor oscillations in the range of 0.05 to 0.12 Hz in blood pressure and heart rate, assumed to be associated with baroreceptor activity, were shifted to lower values as compared with the other two groups. The frequency shift was assessed by median frequency of the oscillations. Significant between-group differences were observed in the supine and sitting positions. No significant between-group differences were seen in normalized spectral power estimates. Further studies are required to determine whether the frequency shift provides prognostic information on cardiovascular morbidity.
R Takalo; I Korhonen; V Turjanmaa; S Majahalme; M Tuomisto; A Uusitalo
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of hypertension     Volume:  10     ISSN:  0895-7061     ISO Abbreviation:  Am. J. Hypertens.     Publication Date:  1997 May 
Date Detail:
Created Date:  1997-07-11     Completed Date:  1997-07-11     Revised Date:  2009-02-24    
Medline Journal Info:
Nlm Unique ID:  8803676     Medline TA:  Am J Hypertens     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  500-4     Citation Subset:  IM    
Department of Clinical Physiology, Tampere University Hospital, Finland.
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MeSH Terms
Biological Clocks / physiology
Blood Pressure / physiology*
Heart Rate / physiology
Hypertension / physiopathology*
Middle Aged
Pressoreceptors / physiology*
Vasomotor System / physiology*

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