Side branch stent with split proximal end

Two stents for implantation into a vessel of a human body are described. The first stent is in the form of a longitudinal axis, a proximal end and a distal end. The stent has a distal section comprising a plurality of circumferential sets (12) of strut members. Each set of strut members is longitudinally separated each from the other and each set of strut members forms a cylindrical portion of the stent. The stent also has a proximal section comprising at least three spokes (15). Each spoke is connected to the proximal-most circumferential set (18) of strut members of the distal section of the stent. The second stent also has a longitudinal axis, a proximal end and a distal end. The stent has a cylindrical distal section and a split proximal section designed to be flared outward with respect to the cylindrical distal section.