An expandable stent radially adjustable between a collapsed state and an expanded state. The stent generally includes a main body and a plurality of connector segments. The main body has first and second ends, a longitudinal axis extending from the first end to the second end, and a plurality of ring structures. Each of the plurality of connector segments joins adjacent ring structures. Some ring structures may be connected by a pair of diamond connector segments that define a diamond-shaped portion when the stent is in the expanded state. Some ring structures may be connected by flex connector segments oriented to permit rotation of the second ring structure about the longitudinal axis during radial expansion of the stent.