Fig. 2. Effect of spinal cord stimulation on microcirculatory parameters in affected complex regional pain syndrome (CRPS) feet and contralateral clinically unaffected feet, presented as median percentage change from baseline and interquartile ranges. Rest flow (RF) and peak flow (PF) are measured with feet at heart level. The vasoconstriction index (VCI) expresses the heart level to dependency ratio of the rest flow. There are no significant differences from baseline or within groups.