A catheter for delivering a stent includes an outer tube having a proximal end, a distal end and a wall defining a lumen an inner tube disposed within the outer tube and defining a lumen for a guidewire, wherein a portion of a length of the inner tube is wrapped around with a spiral-shaped wire a balloon sealingly connected to the inner tube and the outer tube adjacent the distal ends thereof, the balloon defining an interior volume and having an exterior surface and a marker made from a wire of a highly radiopaque and ductile material, wherein the wire is wrapped in a plurality of at least partially overlapping layers such that the marker is flexible along the length of the catheter.
