A self-expanding stent graft (14) has a helical stent (12) that is wound in a zig-zag pattern along a pitch angle (A) with respect to a plane transverse to the axis of the stent. A bisecting line (22) extending through a bend (18) and between two adjacent angular struts (20) is also angled with respect to the longitudinal axis of the stent. The stent graft is configured to bend one hundred and eighty degrees without kinking.
