Patent ID: 7617004

Claim:
An implantable electrode lead ( 1 ) for stimulation in or on the heart, comprising: a long stretched-out electrode body ( 3 ) having a distal and a proximal end, at least one connecting unit ( 4 a , 4 b , 4 c ) for the electrical connection to an electrically active implantable device at the proximal end, a fixation device ( 6 b ) at the distal end, a largely electrically insulating and sealing outer surface ( 17 ) situated between the distal and proximal end, at least one electrically conductive connection ( 16 ) between the proximal and distal end, and at least one outwardly electrically active region ( 5 a , 5 b ) in the distal region of the long stretched-out electrode body ( 3 ) that is electrically connected to one of the electrically conductive connections ( 16 ) wherein: the at least one outwardly electrically active region is composed of at least one element of “Drawn Filled Tube” (DFT) comprising an element of a helically wound DFT ribbon ( 13 a ), said element comprising: an enveloping component ( 30 ) of high bioresistance, biocompatibility and non-toxicity, and a core component ( 31 ) with low electrical resistance, said core component ( 31 ) being a core of said element and said core component being enveloped by said enveloping component ( 30 ); the DFT ribbon ( 13 a ) of the at least one electrically active region ( 5 a , 5 b ) has in the distal region a radially outwardly oriented semi-circular surface ( 32 ); and the semi-circular surface ( 32 ) has a radius significantly larger than half the diameter of the electrode body ( 3 ).