Figure 6.

Changes in response to postural change from predosing to postdosing (D − 1 to D + 1) in the sympathetic measure (ΔLFa, solid line with squares) and systolic BP (ΔsBP, broken line with triangles). Also shown is the resting systolic BP (broken line with filled asterisks; the scale is on the right). These are averages from 22 of the patients from the cohort who had more than four serial tests. The test series are centered on the test just prior to which midodrine was introduced (designated on the abscissa as “D”). See text for details.