An electrode structure (10, 30, 40, 80) for use in transvascular neurostimulation, comprising the electrode structure an electrode (12, 32, 42, 82) supported on a carrier film that insulates electricity (14 , 34, 44, 84) and a structure (15, 35, 44) to support a first main face of the support sheet (14, 34, 44, 84) against the inner wall of a blood vessel with the electrode (12, 32, 42, 82) in contact with the inner wall of the blood vessel in which the electrode structure (10, 30, 40, 80) is wound inside an insertion tube (46), and wherein the retaining structure (15 , 35, 44) comprises the backsheet (14, 34, 44, 84) forced to unroll against the inner wall of the blood vessel, characterized in that the support sheet (14, 34, 44, 84) arranged to electrically isolate the electrode (12, 32, 42, 82) of the blood vessel lumen so that an insulating part electrically from the support sheet (14, 34, 15 44, 84) can contact the inner wall of the blood vessel around the periphery of the electrode (12, 32, 42, 82) when the electrode structure (10, 30, 40, 80) is deployed against the inner wall of glass san GUINEO.Una estructura de electrodo (10, 30, 40, 80) para su uso en neuroestimulación transvascular, comprendiendo la estructura de electrodo: un electrodo (12, 32, 42, 82) soportado sobre una lámina de soporte que aísla de la electricidad (14, 34, 44, 84) y, una estructura (15, 35, 44) para mantener a una primera cara principal de la lámina de soporte (14, 34, 44, 84) contra la pared interna de un vaso sanguíneo con el electrodo (12, 32, 42, 82) en contacto con la pared interna del vaso sanguíneo, en la que la estructura de electrodo (10, 30, 40, 80) está enrollada dentro de un tubo de inserción (46), y en la que la estructura de mantenimiento (15, 35, 44) comprende la lámina de soporte (14, 34, 44, 84) forzada a desenrollarse contra la pared interna del vaso sanguíneo, caracterizada porque la lámina de soporte (14, 34, 44, 84) dispuesta para aislar eléctricamente el electro
