A dongle couples an electrophysiologic catheter and a navigational system,including apatient interface unit (PIU). The dongle permits hardware normally carried oncatheter controlhandle to be relocated onto the dongle to render catheter "greener" and lesscostly to manufactureuse. The dongle having a support portion with flexibility, shape memory and/orvarying degrees ofstiffness also advantageously allows a user more control over the placement,position andorientation of the dongle. The dongle has a body with a first electricalinterface unit, and a supportportion with a second electrical interface unit, the support portion having anouter flexible tubularmember with shape memory. In one embodiment, the support portion comprises agoosenecktubing. In another embodiment, the support portion comprises a coiled spring.
