 [ Symptoms ] why would a dr do a doppler on the neck for poor leg circulation  my wife went to the dr for sore legs and they determined she had some type of blockage and sent her to north central heart institute to a heart specialist and he had a doppler ultrasound done on her neck why would he do that for poor leg circulation [ Disease ] the legs are only one problem when there are suspected peripheral artery disease a more critical artery would be the carotids the two main blood supplies to the brain the neck doppler is to make sure the carotids are patent