06501994 is referenced by 56 patents and cites 12 patents.

An implantable lead, being either a fixed or retractable/extendable lead, having a distal tip electrode is adapted for implantation on or about the heart and for connection to a system for monitoring or stimulating cardiac activity. The electrode includes a mechanical fastener such as a fixation helix for securing the electrode to cardiac tissue, which may or may not be electrically active. The implantable electrode with a helical tip includes an electrode which has a distal end and a proximal end. A helix is disposed within the electrode, where the helix is aligned along a radial axis of the electrode. The electrode further includes one or more of the following features: the helix having a coating of an insulating material on a surface of the helix, a porous conductive surface at a base of the helix, a porous conductive element at the end of the electrode having an insulating coating covering from 5-95% of the surface of the porous conductive element. The electrode may farther include an electrode tip having a porous electrical conductive element, such as a mesh screen, disposed on a surface at the distal end of the electrode tip, which can be used as a sensing or pacing interface with the cardiac tissue.

Title
High impedance electrode tip
Application Number
9/121288
Publication Number
6501994 (B1)
Application Date
July 22, 1998
Publication Date
December 31, 2002
Inventor
Randall M Peterfeso
St. Paul
MN, US
Douglas A Heitkamp
White Bear Lake
MN, US
Gary W Goebel
Vadnais Heights
MN, US
Jeffrey T Bartig
Maplewood
MN, US
Ronald W Heil Jr
Roseville
MN, US
Mary Lee Cole
St. Paul
MN, US
Aaron W Janke
St. Paul
MN, US
Agent
Schwegman Lundberg Woessner & Kluth P A
US
Assignee
Cardiac Pacemakers
MN, US
IPC
A61N 1/05
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