A balloon expanded stent delivery system includes an inflation constraint, such as a wire, spirally wound about the longitudinal axis in contact with a balloon and attached to an underlying catheter. A balloon expanded stent is mounted about the balloon and the inflation constraint. The delivery system has a predeployment configuration with the balloon deflated and the stent unexpanded. The system has a deployment configuration in which the inflation constraint constrains the inflated balloon to a spiral shape, the stent is expanded and in contact with the balloon, and the stent has a flow directing surface with a spiral contour that matches the spiral shape of the balloon. In a postdeployment configuration, the stent retains the flow directing surface with the spiral contour.
