A 67-yeаr оld mаn аrrived at the hоspital and he claimed tо have gotten lost in the elevator. Staff noticed he appeared uncoordinated and confused and had trouble expressing himself. A carotid sonogram demonstrated PSV was documented at 607 cm/s and EDV at 195 cm/s in the left CCA. After three days, the patient’s symptoms completely resolved. What do these findings suggest?