A cardiac lead and stylet assembly for facilitating placement of cardiac leads for use in combination with cardiac rhythm management devices. The assembly includes a cardiac lead having a lumen therethrough and stylet having a core sized to extend through the lumen. The stylet includes a substantially helical coil sized and adapted to contact and threadingly engage an inner wall of the lead at a reduced diameter portion of the lumen. The stylet coil is also adapted to be threadingly disengaged from the lead to facilitate removal of the stylet without dislodging the lead from a desired implantation site in the patient.
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