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Comment
. 2016 Jun;67(6):830-3.
doi: 10.1053/j.ajkd.2016.01.014. Epub 2016 Feb 18.

Variability May Be the "Law of Life," but Blood Pressure Variability May Forebode a Shorter Life

Magdalene M Assimon  1 , Jennifer E Flythe  2
Affiliations
Comment

Variability May Be the "Law of Life," but Blood Pressure Variability May Forebode a Shorter Life

Magdalene M Assimon et al. Am J Kidney Dis. 2016 Jun.
No abstract available

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Figures

Figure 1
Figure 1
Blood pressure (BP) variability metrics. Each figure considers one hypothetical patient’s systolic BP measurements over the 7 study visits occurring during the 22-month exposure assessment period of ALLHAT (Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack Trial). Figures are not drawn to scale. (Top panel) In the standard deviation (SD) graph, mean systolic BP during the exposure assessment period is depicted by the solid line, and distances between individual BP measurements (black dots), dashed lines. (Middle panel) To calculate standard deviation independent of the mean, the standard deviation of systolic BP is plotted against mean systolic BP to estimate the parameter a. The shape of the resultant curve is dependent on the raw intraindividual BP data and thus will vary in form. (Bottom panel) In the average real variability graph, the distance between each systolic BP measurement (black dots) and the next is depicted by dashed lines.
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