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SYSTEMS AND METHODS FOR MAKING AND USING MEDICAL ABLATION SYSTEMS AND HAVING MAPPING CATHETERS WITH IMPROVED ANCHORING ABILITY

  • US 20110040167A1
  • Filed: 08/11/2010
  • Published: 02/17/2011
  • Est. Priority Date: 08/14/2009
  • Status: Active Grant
First Claim
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1. A mapping catheter comprising:

  • an elongated body configured and arranged for insertion into patient vasculature, wherein adistal end of the elongated body comprises;

    a distal portion comprising a plurality of electrodes,a proximal portion disposed proximal to the distal portion, anda reduced-dimension portion disposed between the proximal portion and the distal portion, the reduced-dimension portion having a cross-sectional dimension that is less than corresponding cross-sectional dimensions of both a proximally-positioned adjacent section of the distal portion and a distally-positioned adjacent section of the proximal portion;

    wherein the distal end is formed, at least in part, from a memory shape material that bends into a preformed shape upon release from a confined space, the preformed shape comprising a first loop formed, at least in part, by the distal portion, wherein the first loop is transverse to a longitudinal axis of the proximal portion,wherein the reduced-dimension portion is configured and arranged to bend such that the reduced-dimension section advances distally through the first loop when the first loop is held in a fixed position and a force is applied along the longitudinal axis of the proximal portion in a distal direction.

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