A catheter (10) comprising an elongate tubular member having a proximal end and a distal end, and a deflectable tip (11) at the distal end of the elongate tubular member. The deflectable tip (11) comprises a first helical coil (14) having a first diameter and a second helical coil (15) having a second diameter, the first diameter being larger than the second diameter. The first and second helical coils (14, 15) are arranged in a manner of a double helix. When viewed in cross-section, the first helical coil (14) and the second helical coil (15) are aligned at a first point on a circumference of each coil and misaligned at a second point on the circumference of each coil, where the second point is approximately 180 degrees from the first point. In certain embodiments the catheter further includes a dilatation balloon. Methods of use for crossing a chronic total occlusion are also described.