Patent ID: 8644956

Claim:
A shock electrode line ( 5 ) comprising: a proximal end configured to connect to an implantable device ( 3 ) wherein said implantable device is configured to generate shock pulses; a distal segment having a shock electrode ( 7 ); wherein an area ratio of the shock electrode to a surface area of the shock electrode line ( 5 ) is not constant over a longitudinal extent of the shock electrode ( 7 ); wherein the shock electrode ( 7 ) is configured as a tube with a conductive structure arranged on a surface of the shock electrode ( 7 ); wherein the conductive structure has a non-constant layer height in a direction away from said tube along the shock electrode ( 7 ) so that the layer height is different at different locations along the shock electrode ( 7 ) to provide higher and lower hardness values along the shock electrode ( 7 ) respectively wherein said shock electrode is configured with at least one preferential bend direction having said lower hardness value; wherein the conductive structure has a coil ( 78 ), whose pitch is not constant; and, wherein the conductive structure has at least two layers ( 72 , 73 ) with a different conductivity wherein said at least two layers comprise a first layer arranged on a surface of the tube and a second layer arranged on top of said first layer.