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Doctors
should not make hypertension treatment decisions based solely
on the blood pressure readings that they have taken in their
offices of patients, according to a study reported in the
August 3rd issue of the British Medical Journal.
British
researchers said the doctors should also take into account
the blood pressure readings that patients themselves have
taken at home as well as those taken by nurses. Doing so would,
they added, would counteract the so-called "white coat
effect," in which patient discussions with their doctors
during a measurement have been shown to increase blood pressure.
Eight
doctors and three nurses participated in the research involving
200 patients, who had either been newly diagnosed with high
blood pressure or were already receiving treatment.
Blood
pressure readings were repeatedly made by either a nurse,
home measurement, ambulatory monitoring or by a doctor. The
researchers found readings made by the doctors were high in
comparison to those by the nurses or measured by the patients
at home. Overall the home measurement system performed significantly
better than all other methods and was also preferred best
by patients, according to the researchers.
"The
white coat effect is important in diagnosing and assessing
control of hypertension in primary care and is not a research
artefact," concluded the researchers. "If ambulatory
or home measurements are not available, repeated measurements
by a nurse or the patient should result in considerable less
unnecessary monitoring, initiation and changing of treatment.
It is time to stop using high blood pressure readings by general
practitioners to make decisions about treatment."
Source:
Hypertension
Week of August 11, 2002

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