Document Detail

Time of day to monitor ambulatory blood pressure affects the outcome.
MedLine Citation:
PMID:  15687873     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: The reproducibility of blood pressure variables from ambulatory blood pressure monitoring (AMBP) initiated at the same time of day (SAME: 1700-1900 h) was compared with the reproducibility of blood pressure variables when monitoring was initiated at opposite times of day (OPP: randomized, morning=0700-0900 h and evening=1700-1900 h). It was hypothesized that the reproducibility for SAME (n=18) would be no different than the reproducibility for OPP (n=13). METHODS: The order of AMBP sessions was randomized. The Accutracker II was used to determine average blood pressures, Crest (CrBP), Trough (TrBP), and TrBP : CrBP ratio; Averages were divided into 24-h, daytime (0600-2200 h), and night-time (2200-0600 h) for both systolic and diastolic blood pressures. A paired t-test with an intraclass correlation was used to determine the reproducibility of AMBP for both SAME and OPP. A chi-square was used to compare the distribution of reproducible AMBP variables between SAME and OPP. Significance was at P<0.05. RESULTS: The reproducibility of AMBP variables for SAME and OPP was a significantly different for systolic blood pressure. All of the ambulatory systolic variables measured in the SAME group were reproducible except for the TrBP : CrBP, whereas only the systolic night-time averages of the OPP group were reproducible. Similarly all of the ambulatory diastolic variables measured in the SAME group were reproducible except for TrBP : CrBP, whereas 24-h, night-time averages, and TrBP were reproducible in the OPP group. CONCLUSIONS: Ambulatory blood pressure variables were consistently higher when the monitoring session began in the morning hours.
Janet P Wallace; Saejong Park; Donald W Zakutansky; Larissa A A Lehmkuhl; Chester A Jastremski
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Blood pressure monitoring     Volume:  10     ISSN:  1359-5237     ISO Abbreviation:  Blood Press Monit     Publication Date:  2005 Feb 
Date Detail:
Created Date:  2005-02-02     Completed Date:  2005-06-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9606438     Medline TA:  Blood Press Monit     Country:  England    
Other Details:
Languages:  eng     Pagination:  43-50     Citation Subset:  IM    
Clinical Exercise Physiology Laboratory, Department of Kinesiology, Indiana University, Bloomington, Indiana 47405, USA.
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MeSH Terms
Blood Pressure
Blood Pressure Monitoring, Ambulatory / methods*
Circadian Rhythm
Hypertension / physiopathology
Middle Aged
Reproducibility of Results

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

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