A system for providing dilation and support to a body vessel includes a shaft having two compliant balloons (318,319) attached to the shaft and spaced apart longitudinally from each and defining a longitudinal intermediate space between them. The shaft includes an inflation lumen for inflating the balloons (318,319) and a delivery lumen for delivering secondary balloons (350) into the intermediate space. Secondary balloons (350) are deliverable over wires (340) that extend through the delivery lumen and out of the side-ports of the shaft, with the secondary balloons (350) delivered through the side ports and to a desired location and inflated in the intermediate space or adjacent the intermediate space, such as to branch vessels. The compliant balloons are inflatable toward each other to take up the intermediate and conform to the shape of the body vessel and the secondary balloons.
