A guidewire comprising an elongate guide member dimensioned for insertionwithin a body vessel of a subject is disclosed. The guide member defines alongitudinalaxis and has trailing and leading end segments. The leading end segment has areducedcross-sectional dimension relative to a cross-sectional dimension of thetrailing endsegment. The leading end segment includes at least one finger thereon. A firsttransversedimension of the finger is greater than a corresponding first transversedimension of theleading end segment in contact therewith.
