The invention relates to a flexible conductor carrier (5, 5a-b, 6, T) comprising an elongated inserted section (5, 5a-b, 6) intended to be arranged in a lumen (2a-b) in a flexible catheter. The inserted section (5, 5a-b, 6) comprises a flat section (5, 5a-b) and a rolled section (6). The flat section provides higher tolerance to bending than a fully-rolled counterpart. Typically, at least one electrode (4a-b) is fixed around the rolled section (6).
