A support (3) for an embolic protection filter comprises a support element in the form of one or more wires (20) of superelastic material, such as Nitinol. A core of radiopaque material is embedded within at least portion of at least one of the support wires (20). The core may be in the form of a wire (21) of a suitable radiopaque material, such as gold, or platinum, or mercury and extends along the length of a support wire. The radiopaque wire (21) is located substantially along the neutral axis of bending of the support wire (20). The radiopaque wire (21) provides visualisation for a clinician during transport of the filter (1) through a vasculature and deployment of the filter (1) in the vasculature.
