| http://www.w3.org/ns/prov#value | - Accordingly, the present invention is a catheter small enough to fit within the arteries of a human heart, having a soft flexible pre-formed distal tip with a curvature of ninety degrees or greater, that when used in combination with a variable stiffness guidewire, allows the adjustment of the distal end of the guidewire to be aimed at, and directed into, the branches of a blood vessel.
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