| 摘要 |
A pacing lead (10) of the invention is characterized by a screw-in tip (12) that is longer than conventional tips ans is provided with an electrically active distal electrode (14), which is insulated from the proximal part of the screw tip of the pacemaker lead. This electrically active distal screw-in tip is extended from the right ventricular septal endocardium (22) into the left side of the interventricular septum (26) and is used for left ventricular pacing with optional properly synchronized right ventricular pacing. In the illustrated embodiment the lead is shown as being comprised of a lead through which a stylet (13) is disposed, the stylet engaging a follower nut (15) with external threading which in turn engages internal threading (17) provided in the interior surface of the lead. Rotation of the stylet rotates the follower nut to advance or retract the nut within the threading to allow advancement of the tip at least more than halfway through the entire septum.
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