Ambulatory blood pressure in schoolchildren
J J O'Sullivana, G Derricka, P Griggsa, R Foxallb, M Aitkinb, C Wrena
a Department
of Paediatric Cardiology, Freeman Hospital, Newcastle upon Tyne NE7
7DN, UK, b Department of Statistics,
University of Newcastle upon Tyne, Newcastle upon Tyne, UK
Correspondence to: Dr O'Sullivan.
Accepted 8 December
1998
OBJECTIVE
To define
the range and variability of ambulatory blood pressure in normal schoolchildren.
DESIGN
Prospective study.
METHODS
Resting blood
pressure of 1121 schoolchildren from Newcastle upon Tyne was recorded.
An ambulatory blood pressure device, which uses both auscultatory
(Korotkoff) and oscillometric methods of blood pressure measurement,
was then put in place for 24 hours.
RESULTS
The day was
divided into three time periods: school, home, and night time. Normal
centiles for blood pressure for each of these time periods were
obtained and many daytime readings were outside reported normal resting
levels. The normal variation of blood pressure was quantified by
comparing each of these time periods with the resting readings. Resting
systolic blood pressure did not predict 24 hour mean systolic blood pressure.
CONCLUSIONS
The
availability of normal ambulatory blood pressure data on the level and
variation of blood pressure in children may facilitate the early
identification of hypertension in this age group.
Keywords: ambulatory blood pressure; Korotkoff; blood pressure variation
© 1999 by Archives of Disease in Childhood
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