LONG TERM BLOOD PRESSURE MONITORING J. Dušek 1, B. Fišer 1, J. Siegelová 1, P. Vank 1, G....
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Transcript of LONG TERM BLOOD PRESSURE MONITORING J. Dušek 1, B. Fišer 1, J. Siegelová 1, P. Vank 1, G....
![Page 1: LONG TERM BLOOD PRESSURE MONITORING J. Dušek 1, B. Fišer 1, J. Siegelová 1, P. Vank 1, G. Cornelissen 2, F. Halberg 2 1 Masaryk University, Brno 2 Halberg.](https://reader035.fdocuments.us/reader035/viewer/2022062713/56649cf35503460f949c0e4e/html5/thumbnails/1.jpg)
LONG TERM BLOOD PRESSURE MONITORING
J. Dušek1, B. Fišer1, J. Siegelová1, P. Vank1, G. Cornelissen2, F. Halberg2
1Masaryk University, Brno2Halberg Chronobiology Center, University
of Minnesota, Minneapolis, MN, USA
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AIM OF THE STUDY
is comparison between casual blood pressure measurements and 7-day blood pressure monitoring.
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METHODS
Ninety- one subjects without antihypertensive therapy (age between 20 and 80 years) were recruited for 7-day ambulatory BP monitoring (Collins Japan).
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METHODS
The obtained data were fitted with sinusoid curve (wave length 24 hours) by the least square method and mean value, so called MESOR (M) was determined.
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METHODS The data of M of systolic blood pressure and diastolic blood pressure were compared with the values of one measurement at 10 a.m. (representative of casual blood pressure measurement). Further we compared M with mean values of 7 days 10 a.m. measurements.
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RESULTS
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SBP
y = 1,0305x - 1,219R2 = 0,3687
0
20
40
60
80
100
120
140
160
180
200
80 90 100 110 120 130 140 150 160
MESOR (mmHg)
ON
E B
LOO
D P
RE
SS
UR
E
ME
AS
UR
EM
EN
T (m
mH
g)
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DBP
y = 1,0838x - 2,9439
R2 = 0,4838
0
20
40
60
80
100
120
0 20 40 60 80 100 120
MESOR (mmHg)
ON
E M
EA
SU
RE
MN
T (m
mH
g)
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The comparison of M with one 10 a.m. value of the 4 day of the monitoring revealed correlation (SBP: r=0.61, DBP: r=0.70) but the difference between measured values and expected values was in 70 % subjects higher than 6 mmHg of SBP. The corresponding proportion of subjects for DBP was 49 %. This indicates the low reliability of one measurement.
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SBP
y = 0,9747x + 9,0004R2 = 0,7123
0
20
40
60
80
100
120
140
160
180
80 90 100 110 120 130 140 150 160
MESOR (mmHg)
ME
AN
OF
7 M
EA
SU
RE
ME
NTS
(m
mH
g)
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DBP
y = 1,0472x + 0,747
R2 = 0,7148
0
20
40
60
80
100
120
0 20 40 60 80 100 120
MESOR (mmHg)
ME
AN
OF
7 M
EA
SU
RE
ME
NTS
(m
mH
g)
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Using the 7 days mean 10 a.m. values the reliability increased (SBP: r=0.84, DBP: r=0.85) but despite the high correlation the difference higher than 6 mmHg was found in 32 % subjects (SBP), respective in 19 % (DBP).
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CONCLUSION
Our results clearly indicate the advantage of the long term blood pressure monitoring over casual blood pressure measurement for the blood pressure evaluation.
Support: MSM0021622402