a to a second position 32 for example where distal end 232 of outer tube 230 is approximately aligned with flared distal end 222 of inner member 220 which is illustrated in fig3 b alternately second position 32 may be located more proximally such that more of inner member is exposed distal to distal end 232 of outer tube 230 or more distally such that only fixation member 115 of device 100 is exposed according to some embodiments an o ring type seal member i e silicone not shown which may be lubricated for example with silicone oil forms a dynamic sealing interface between outer tube 230 and inner member 220 within handle 210 in proximity to first control member 211 with further reference to fig3 a device 100 is shown held within the distal most portion of outer tube 230 just proximal to distal end 232 fig3 a further illustrates a proximal end 121 of device 100 abutting flared distal end 222 of inner member 220 which preferably conforms to proximal end 121 of device 100 with reference back to fig1 b it may be appreciated that delivery system assembly 200 is preferably employed in place of the illustrated guiding catheter 150 to deliver device 100 through the venous system and into proximity with a target implant site for example in the rv when.