Patent ID: 8702744

Claim:
A balloon catheter comprising: a catheter having proximal and distal ends, including a dilatation balloon disposed on the distal end and coupled to an inflation port at the proximal end by an inflation lumen, the catheter comprising an array of discrete dissimilarly shaped radio-opaque markers permanently affixed at the distal end, each of the markers in the array disposed equidistant from the distal end and aligned about a predetermined circumference of the catheter to facilitate determination of placement and angularity of the catheter relative to an ostium, the array of radio-opaque markers having an elliptical pattern when the catheter is fluoroscopically imaged at a first angle oblique to a longitudinal axis of the catheter, and a linear pattern when the catheter is fluoroscopically imaged at a second angle in alignment with the longitudinal axis of the catheter.