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Endocardiac lead having an active fastening means

  • US 5,259,394 A
  • Filed: 12/23/1991
  • Issued: 11/09/1993
  • Est. Priority Date: 12/27/1990
  • Status: Expired due to Term
First Claim
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1. An endocardiac lead of the type comprising a sheath (1), an electrode (3), a helix (6), a conductive spiral winding (2) placed inside the sheath (1) made of a flexible insulating material which is insensitive to body fluids, the spiral winding (2) being electrically connected to the electrode (3) intended for being brought into contact with the inner wall of the heart, said electrode (3) being hollow and receiving along its centerline the helix (6) for fastening the lead into the heart muscle, characterized in that the internal diameter of the electrode (3) is smaller than the external diameter of the helix (6), and in that the helix (6) presents a sufficient modulus of longitudinal elasticity for being retractable within the electrode (3) with a mechanical deformation, and in that the helix (6) will substantially recover its initial shape when being extracted out of the electrode.

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