Bipolar screw-in packing lead assembly

Claim 1

An endocardial bipolar lead assembly which is adapted to be placed in a body through a blood vessel and which is adapted to be mechanically secured to tissue of the body in an electrically conductive manner, said lead assembly comprising: an insulated tubular sheath, said tubular sheath having a distal end and a proximal end; first and second conductive means, said first conductive means having a distal end and a proximal end, said first conductive means extending substantially the length of said tubular sheath, said second conductive means having a distal end and a proximal end, said second conductive means extending substantially the length of said tubular sheath and said first conductive means being insulated from said second conductive means; an electrode assembly located at said distal end of said tubular sheath; said distal electrode assembly comprising a ring cathode electrode and a tissue-attachment anode electrode member, said tissue-attachment anode electrode having a distal end and a proximal end, said distal end of said first conductive means being mechanically and electrically coupled to said proximal end of said tissue-attachment anode electrode member, said distal end of said second conductive means being electrically connected to said ring cathode electrode, said tissue-attachment anode electrode member being capable of mechanically securing said distal electrode assembly to tissue of a body with said tissue-attachment anode electrode member and said ring cathode electrode adapted to be in direct electrical contact with tissue of the body; a single finger-shaped proximal terminal electrode assembly including cathode terminal pin means mechanically coupled to said first conductive means, said terminal pin means being electrically isolated from said first conductive means, said terminal pin means being electrically coupled to said second conductive means, and an anode ring on said assembly insulated from said cathode terminal pin means and said second conductive means, said anode ring being electrically coupled to said first conductive means, said terminal pin means being adapted to be coupled to a cathode of an electrical power source and said anode ring being adapted to be coupled with an anode of the electrical power source, and activating means including at least a portion of said single finger-shaped proximal terminal electrode assembly for mechanically activating said tissue-attachment anode electrode member for securing said distal electrode assembly to tissue.