An apparatus for neurovascular endoluminal intervention, in particular for the treatment of ischemic stroke, is provided. The apparatus comprises a catheter (2) for insertion into the circulatory system (CS) of a patient, in order to aspirate one or several clots (C) present in the circulatory system (CS). A distal outer section (22) of the catheter (2) comprises an unexpanded state, in which the diameter (D2) of the distal outer section (22) is smaller than the diameter (D1) of a proximal outer section (21) of the catheter (2), in order to facilitate navigation of the catheter through the circulatory system, and a radially expanded state, in order to facilitate aspiration of the one or several clots (C) through the catheter (2). Furthermore, a method for applying such an apparatus is provided.