The effect of sitting on a derby chair (height, 48 cm), fishing chair
(38 cm), and footstool (20 cm) on the improvement of postural hypotens
ion was studied serially in 8 patients with autonomic failure. The inc
rement in blood pressure during sitting was higher by using a lower po
rtable chair. This was related to an increasing cardiac output at lowe
r sitting heights, The fishing chair was, according to our patients' e
xperience, most useful.