A conductive tip catheter includes a flexible tubular member defining a lumen that extends between a proximal end and a distal end. The conductive tip catheter also includes an electrically conductive metallic coil at least partially located within the lumen of the flexible tubular member. The electrically conductive metallic coil includes a first region located at a distal end of the metallic coil and having a first pitch, a second region proximal to the first region and having a second pitch that is greater than the first pitch, and a third region proximal to the second region and having a third pitch that is different from the first pitch and the second pitch. A conductive tip is located at the distal end of the flexible tubular member, and the conductive tip defines a tip lumen in fluid communication with the lumen.
