| 摘要 |
A cardiac stimulator lead is provided that includes a connector for connecting to a cardiac stimulator and a tubular insulating sleeve that has a first end coupled to the connector and a second end. An electrode is coupled to the second end and has a longitudinal bore. An extendable/retractable corkscrew is positioned in the bore. The cork screw has a selected pitch and is mounted on a threaded shaft. Threads on the shaft have a different pitch from the pitch of the cork screw, preferably a pitch less than that of the cork screw, and most preferably a pitch about half that of the corkscrew.
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