and a second transition sleeve 4 connector legs 2 are adapted to electrically couple electrodes 15 16 19 and 20 and sensor 17 to an imd in a manner well known to those skilled in the art insulated electrical conductors not shown coupling each electrode 15 16 19 and 20 and sensor 17 to connector legs 2 extend within lead body 11 arrangements of the conductors within lead body 11 include coaxial positioning at least up to the sensor capsule 17 non coaxial positioning and a combination thereof according to one exemplary embodiment lead body 11 is formed in part by a silicone or polyurethane multilumen tube wherein each lumen carries one or more conductors fig6 is a cross sectional view of a coaxial conductive lead body 11 adapted for operative coupling proximal of a sensor capsule taken along the line 6 6 of fig5 b according to the invention in fig6 an inner conductor 50 is spaced from an outer conductor 52 with an insulative material 54 disposed therebetween the exterior of the biocompatible outer insulation 56 of the lead body 11 shields the conductors 50 52 from contact with conductive body fluid one aspect of the instant invention involves failure of the outer insulation.