公开(公告)号：US5456707A

公开(公告)日：1995-10-10

申请号：US141874

申请日：1993-10-22

申请人： Vincent Giele

发明人： Vincent Giele

IPC分类号： A61N1/05 ,  A61N1/04

CPC分类号： A61N1/056

摘要： A pacing lead for connection between a pacemaker and a patient's heart, the pacing lead having conventional flexibility through proximal and distal lengths, and increased stiffness through an intermediate or middle length. The increased stiffness of the intermediate distance provides enhanced torsion characteristics, permitting easier and more accurate manipulation of the distal end of the lead. Increased stiffness of the intermediate length can be provided by a shrink tubing over the intermediate section of the lead coil, by a coating which is sprayed onto the coil to restrict its flexibility, or a tubing which is interference fit within the ID of the lead outer casing so as to constrain variation of the coil and increased stiffness. In each embodiment the friction between the coil and the outer casing is reduced through the intermediate middle length, so as to reduce the amount of twisting that is transmitted through to the tube casing, thereby enabling more efficient rotation of the anchor mechanism at the distal end of the lead.

摘要翻译： 用于起搏器和患者心脏之间连接的起搏引线，起搏引线具有通过近端和远端长度的常规灵活性，以及​​通过中间或中间长度增加的刚度。 中间距离的增加的刚度提供增强的扭转特性，允许更容易且更准确地操纵引线的远端。 中间长度的增加的刚度可以通过在引线圈的中间部分上的收缩管，喷涂到线圈上以限制其柔性的涂层或在引线外部的ID内干涉配合的管道来提供 以限制线圈的变化和增加的刚度。 在每个实施例中，线圈和外壳之间的摩擦通过中间中间部分减小，以便减少传递到管壳体的扭转量，从而使锚固机构在远端更有效地旋转 的领先。

公开(公告)号：US3920024A

公开(公告)日：1975-11-18

申请号：US35135373

申请日：1973-04-16

申请人： VITATRON MEDICAL BV

发明人： BOWERS DAVID L

IPC分类号： A61B5/0402 ,  A61N1/365 ,  A61N1/37 ,  A61N1/36

CPC分类号： A61N1/3712

摘要： A demand type pacing system for stimulating a physiological system such as a human heart, having an integrated control system for dynamically measuring the stimulation threshold of the heart for evoking a desired response and adjusting the stimulating level as a function of the measured threshold. The pacer has means for programmably varying the stimulation level so as to find the threshold, and backup circuitry to re-establish the stimulating level safely above threshold following a response failure due to either a programmed or naturally caused threshold detection.

摘要翻译： 一种用于刺激诸如人类心脏的生理系统的需求型起搏系统，具有用于动态测量心脏的刺激阈值以便引起期望的响应并根据测量的阈值调整刺激水平的综合控制系统。 起搏器具有用于可编程地改变刺激水平以找到阈值的装置，以及备用电路，用于由于编程或自然引起的阈值检测而在响应故障之后重新建立安全地超过阈值的刺激水平。

公开(公告)号：US5282465A

公开(公告)日：1994-02-01

申请号：US830651

申请日：1992-02-04

申请人： Johannes S. van der Veen ,  Malcolm J. S. Begemann ,  Gustaaf A. P. Stoop

发明人： Johannes S. van der Veen ,  Malcolm J. S. Begemann ,  Gustaaf A. P. Stoop

IPC分类号： A61N1/362 ,  A61N1/365

CPC分类号： A61N1/3622

摘要： A dual chamber pacemaker system is provided having an improved Wenckebach response for optimizing tracking of atrial signals having rates within a rate range above the normal tracking range, i.e., in a designated Wenckebach range. When an atrial sense occurs in the Wenckebach range, the AV delay is extended up to a predetermined maximum extension to enable delivery of a ventricular pulse at the ventricular upper rate limit (dynamic tracking limit). When the AV delay would have to be extended beyond the maximum extension in order to pace the ventricle at the dynamic tracking limit, the next ventricular stimulus is delivered asynchronously at an escape interval greater than the escape interval corresponding to the dynamic tracking limit, e.g., at a predetermined lower pacing limit.

摘要翻译： 提供双室起搏器系统，其具有改进的Wenckebach响应，用于优化具有高于正常跟踪范围的速率范围内的速率的心房信号的跟踪，即在指定的Wenckebach范围内。 当在Wenckebach范围发生心房感觉时，AV延迟被延长到预定的最大延伸，以使得能够以心室上限速度（动态跟踪极限）递送心室脉搏。 当AV延迟必须延伸超出最大延长时间以便在动态跟踪极限下对心室进行调节时，下一个心室刺激以大于对应于动态跟踪极限的逃生间隔的逃生间隔异步传递，例如， 在预定的较低起搏极限。