An elongate catheter having a proximal end and a distal end comprising: a) an elongate tubular main body having a proximal end, a distal end, and defining at least one elongate passage therethrough, the elongate tubular main body defining a longitudinal axis along its length; b) a first elongate inner body having a proximal end and a distal end that is slidably disposed within the at least one elongate passage of the elongate tubular main body, the distal end of the first inner elongate body being configured to curl away from the longitudinal axis in a proximal direction when the first elongate inner body is advanced distally with respect to the main body; and c) a second elongate inner body having a proximal end and a distal end that is slidably disposed within the at least one elongate passage of the elongate tubular main body, and slidably disposed with respect to the first inner body, the distal end of the second inner elongate body being configured to curl away from the longitudinal axis toward the deployed proximally oriented distal end of the first elongate inner body when the second elongate inner body is advanced distally with respect to the main body, wherein: the first elongate inner body and second elongate inner body each define a lumen along their respective lengths; the lumen of the second elongate inner body includes a movable body slidably disposed therein having a distal end, the movable body including a guidewire having an electrically conductive core wire surrounded by a jacket made from dielectric material, wherein the jacket is removed from a portion of the core wire along one side of the core wire to create an exposed region of the core wire; and the distal end of the movable body is configured to penetrate a target tissue region prior to passing into the lumen of the first elongate inner body. a) an elongate tubular main body having a proximal end, a distal end, and defining at least one elongate passage therethrough, the elongate tubular main body defining a longitudinal axis along its length; b) a first elongate inner body having a proximal end and a distal end that is slidably disposed within the at least one elongate passage of the elongate tubular main body, the distal end of the first inner elongate body being configured to curl away from the longitudinal axis in a proximal direction when the first elongate inner body is advanced distally with respect to the main body; and c) a second elongate inner body having a proximal end and a distal end that is slidably disposed within the at least one elongate passage of the elongate tubular main body, and slidably disposed with respect to the first inner body, the distal end of the second inner elongate body being configured to curl away from the longitudinal axis toward the deployed proximally oriented distal end of the first elongate inner body when the second elongate inner body is advanced distally with respect to the main body, the first elongate inner body and second elongate inner body each define a lumen along their respective lengths; the lumen of the second elongate inner body includes a movable body slidably disposed therein having a distal end, the movable body including a guidewire having an electrically conductive core wire surrounded by a jacket made from dielectric material, wherein the jacket is removed from a portion of the core wire along one side of the core wire to create an exposed region of the core wire; and the distal end of the movable body is configured to penetrate a target tissue region prior to passing into the lumen of the first elongate inner body.