Abstract: A stylet for use with an implantable pacing lead and for checking purposes after this implantation. The pacing lead is a hollow elongated conductor including coiled wire forming continuous turns. The stylet comprises a flexible, straight filament and a blunting tip having an axially symmetrical shape. The rear end of the tip is provided with an axially symmetrical cavity at the bottom of which is secured the distal end of the filament. Upon insertion of the stylet in the conductor of an implanted pacing lead, for example for checking the correct connection of the conductor in the heart's tissue, the tip by virtue of its shape is prevented from catching in the grooves, existing between the turns of the coiled wire, as the style moves around bends formed in the conductor while it is in a blood vessel, thereby facilitating the insertion of the stylet.