| 摘要 |
A cardiac stimulator lead (10) is provided that includes a connector (16) for connecting to a cardiac stimulator (24) and a tubular insulating sleeve (12) that has a first end (14) coupled to the connector (16) and a second end (18). An electrode (20) is coupled to the second end and has a longitudinal bore. An extendable/retractable corkscrew (26) is positioned in the bore. The corkscrew has a selected pitch and is mounted on a threaded shaft. Threads on the shaft have a different pitch from the pitch of the corkscrew, preferably a pitch less than that of the corkscrew, and most preferably a pitch about half that of the corkscrew.
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