A medical electrical lead that includes a lead body (12) having a lead body lumen (102), an electrode head assembly (113) fixedly engaged with the lead body and having an electrode head assembly lumen (104) communicating with the lead body lumen (102), and a conductor (26) extending within the lead body lumen and the electrode head assembly lumen. An insulating member (120) extends through the electrode head assembly lumen and the lead body lumen to electrically isolate the conductor.
