Medical lead with flexible distal guidewire extension
First Claim
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1. An implantable cardiac vein lead comprising:
- an elongated lead body extending between a lead body proximal end anda lead body distal end;
the lead body including a sidewall enclosing at least one electrical conductor;
an elongated flexible distal guidewire extension affixed to, and extending distally from the lead body distal end to a guidewire extension distal tip, the guidewire extension including a pre-formed bend that disposes the distal tip thereof laterally beyond the lead body sidewall; and
a distal fixation helix affixed to and extending distally from the lead body distal end, the fixation helix including a sharpened tip and being adapted to affix the lead body distal end at an implantation site, wherein at least a proximal portion of the guidewire extension distal tip and the helix sharpened tip both point in a same general direction.
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Abstract
An implantable medical lead is provided with a distal guidewire extension. A flexible distal guidewire extension, which may take the form of a helically wound wire around a tapered core, extends from the distal end of a lead body. The extension may exit a tip electrode, which may be a generally rounded electrode or an active fixation electrode. The distal guidewire extension is preferably insulated, but may be provided with an uninsulated segment for serving as an electrode.
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Citations
12 Claims
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1. An implantable cardiac vein lead comprising:
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an elongated lead body extending between a lead body proximal end and a lead body distal end; the lead body including a sidewall enclosing at least one electrical conductor; an elongated flexible distal guidewire extension affixed to, and extending distally from the lead body distal end to a guidewire extension distal tip, the guidewire extension including a pre-formed bend that disposes the distal tip thereof laterally beyond the lead body sidewall; and a distal fixation helix affixed to and extending distally from the lead body distal end, the fixation helix including a sharpened tip and being adapted to affix the lead body distal end at an implantation site, wherein at least a proximal portion of the guidewire extension distal tip and the helix sharpened tip both point in a same general direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification