A catheter assembly for engaging a stenosis and for stent delivery, the assembly comprising: a catheter including a wall having a proximal end and a distal end disposed along a longitudinal axis, the wall having an interior surface and an exterior surface, the interior surface defining a first lumen and a second lumen spaced apart and disposed about the longitudinal axis, the wall defining an opening extending between the inner surface and the exterior surface, the opening being in communication with the first lumen so as to define a flow path having an angle incident to the longitudinal axis; a first marker disposed about the exterior surface along the longitudinal axis; and a second marker disposed about the exterior surface along the longitudinal axis, the first and second markers being spaced from one another along the longitudinal axis so as to be substantially equidistant from the opening; a balloon having a first end and a second end defining a holding volume therebetween, the first end and the second ends being sealed about the exterior surface, the opening being disposed within the holding volume so as to place the first lumen in sealed fluid communication with the holding volume for inflating and deflating the balloon through the opening, the first and second ends being spaced substantially equidistantly about the opening along the longitudinal axis; and the balloon having a non-tapered central region and two tapered ends; and a balloon dilatable stent disposed about the balloon, the balloon being configured to engage the stent with a stenosis and effect stent delivery by chaneling a contrast fluid along the catheter and into the holding volume of the balloon through the opening to fully dilate the balloon and the stent, and characterised in that: the stent is disposed about the non-tapered central region of the balloon only, the stent being evenly and radially expanded about the central region of the balloon. a catheter including a wall having a proximal end and a distal end disposed along a longitudinal axis, the wall having an interior surface and an exterior surface, the interior surface defining a first lumen and a second lumen spaced apart and disposed about the longitudinal axis, the wall defining an opening extending between the inner surface and the exterior surface, the opening being in communication with the first lumen so as to define a flow path having an angle incident to the longitudinal axis; a first marker disposed about the exterior surface along the longitudinal axis; and a second marker disposed about the exterior surface along the longitudinal axis, the first and second markers being spaced from one another along the longitudinal axis so as to be substantially equidistant from the opening; a balloon having a first end and a second end defining a holding volume therebetween, the first end and the second ends being sealed about the exterior surface, the opening being disposed within the holding volume so as to place the first lumen in sealed fluid communication with the holding volume for inflating and deflating the balloon through the opening, the first and second ends being spaced substantially equidistantly about the opening along the longitudinal axis; and the balloon having a non-tapered central region and two tapered ends; and a balloon dilatable stent disposed about the balloon, the balloon being configured to engage the stent with a stenosis and effect stent delivery by chaneling a contrast fluid along the catheter and into the holding volume of the balloon through the opening to fully dilate the balloon and the stent, and characterised in that: the stent is disposed about the non-tapered central region of the balloon only, the stent being evenly and radially expanded about the central region of the balloon.