Document Detail


Seasonal blood pressure variation and its relationship to environmental temperature in healthy elderly Japanese studied by home measurements.
MedLine Citation:
PMID:  20144067     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of the present study was to examine seasonal blood pressure variation and its relationship to environmental temperature in healthy elderly Japanese, as studied by home measurements. Fifteen healthy elderly Japanese (79.3 +/- 5.9 yrs) measured their blood pressure at home each morning for more than 25 times per month for 3 years. Monthly mean outdoor temperatures were obtained from the Takamatsu meteorological Observatory. The highest levels of systolic and diastolic blood pressure measured at home were observed in February (129 +/- 14 and 81 +/- 13 mmHg). The lowest levels of systolic and diastolic blood pressure measured at home were observed in August (117 +/- 11 and 73 +/- 10 mmHg). Likewise, the lowest and highest means of outdoor temperature were observed in February (5.0 degrees C) and August (29.2 degrees C), respectively. Hence, both systolic and diastolic blood pressure demonstrated a close inverse correlation with the means of outdoor temperature (r = -0.973, p < 0.001 and r = -0.985, p < 0.001, respectively). A 1 degree C decrease in the mean outdoor temperature was associated with rises of 0.43 mmHg in systolic blood pressure (SBP) and 0.29 mmHg in diastolic blood pressure (DBP). Seasonal variations in home blood pressure and outdoor temperature showed complete correspondence in healthy elderly Japanese, with the blood pressures being inversely related to the ambient temperature. These seasonal home blood pressure variations should be kept in mind when controlling blood pressure in elderly patients.
Authors:
Toshiaki Kimura; Shoichi Senda; Hisashi Masugata; Ayumu Yamagami; Hiroyuki Okuyama; Takeaki Kohno; Tomohiro Hirao; Megumu Fukunaga; Hiroki Okada; Fuminori Goda
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical and experimental hypertension (New York, N.Y. : 1993)     Volume:  32     ISSN:  1525-6006     ISO Abbreviation:  Clin. Exp. Hypertens.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2010-02-10     Completed Date:  2010-05-04     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9305929     Medline TA:  Clin Exp Hypertens     Country:  England    
Other Details:
Languages:  eng     Pagination:  8-12     Citation Subset:  IM    
Affiliation:
Department of Integrated Medicine, Kagawa University, Kagawa, Japan.
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MeSH Terms
Descriptor/Qualifier:
Aged
Aged, 80 and over
Blood Pressure / physiology*
Blood Pressure Monitoring, Ambulatory
Female
Humans
Japan
Male
Seasons*
Temperature

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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