An infusion catheter includes an elongate catheter body having a longitudinally extending fluid supply passage, and a plurality of stellate side ports for infusing a treatment fluid from the fluid supply passage into a body lumen of a passage. Each of the stellate side ports is defined by sets of at least three convergent leaves having an attached basal edge, a terminal tip, and first and second free edges extending between the attached basal edge and the terminal tip. Making an infusion catheter includes forming a plurality of stellate side ports in fluid communication with a fluid supply passage of an elongate catheter body, each of the stellate side ports being defined by a set of at least three convergent leaves, and setting an infusion length of the infusion catheter during the forming step via spacing the stellate side ports between proximal and distal ends of the elongate catheter body.
