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    • 4. 发明授权
    • Detection of tachyarrhythmia termination
    • 检测快速性心律失常终止
    • US07103404B2
    • 2006-09-05
    • US10375457
    • 2003-02-27
    • Robert W. StadlerEduardo N. WarmanJames H. EricksenReece W. Holbrook
    • Robert W. StadlerEduardo N. WarmanJames H. EricksenReece W. Holbrook
    • A61B5/0452A61N1/37
    • A61N1/3622
    • Determining termination of an identified tachyarrhythmia episode may involve analysis of a relative decrease in tachyarrhythmia rate, a normalization of electrogram morphology criteria, or both. An implanted medical device may obtain a tachyarrhythmia rate and a morphology of a cardiac waveform. The device may compare the tachyarrhythmia rate to a threshold tachyarrhythmia rate and the morphology to a template morphology, and classify the heart beat as indicating termination of the tachyarrhythmia episode when the tachyarrhythmia rate is less than the threshold tachyarrhythmia rate, the morphology categorizes as normal, or both. For arrhythmias with no therapy delivered, observation of arrhythmia behavior at the point of termination may lead to improved classification. In addition, observation of a relative decrease in tachyarrhythmia rate immediately after therapy application can lead to application of slower but more specific criteria for redetection. Also, delivery of cardioversion shocks can be aborted upon tachyarrhythmia termination.
    • 确定确定的快速性心律失常发作的终止可能涉及快速心律失常率相对降低的分析,电描记图形态学标准的归一化或两者。 植入的医疗装置可以获得心律失常速率和心脏波形的形态。 该装置可以将快速性心律失常率与阈值快速性心律失常率和形态学比较为模板形态,并且当心律失常发生率低于阈值快速性心律失常率时,将心跳分类为指示快速性心律失常发作的终止,形态分类为正常, 或两者。 对于没有治疗的心律失常,在终止时观察心律失常行为可能导致分类改善。 另外,在治疗后立即观察到快速性心律失常发生率的相对降低可导致应用较慢但更具体的重新检测标准。 此外,快速性心律失常终止时,心脏复律冲击的输送可以中止。
    • 7. 发明授权
    • Pacemaker having adaptive arrhythmia detection windows
    • 起搏器具有适应性心律失常检测窗口
    • US06708062B2
    • 2004-03-16
    • US10003935
    • 2001-10-30
    • James H. EricksenMartin A. RossingFareed Assad
    • James H. EricksenMartin A. RossingFareed Assad
    • A61N1362
    • A61N1/3622
    • Methods for improving detection of arrhythmias by adaptively increasing arrhythmia detection intervals. One method includes increasing the V2V, the overall cardiac cycle length, thereby decreasing the pacing rate in the presence of ventricular safety paces (VSPs). Another method includes shortening the trigger interval following the atrial pace event, during which time the pacemaker will detect V-sense events, while leaving the A2V VSP interval unchanged, at the end of which any required VSP will be generated. In yet another method, the interval from A-pace to V-pace, the PAV interval, is shortened, while leaving the overall V2V cycle interval unchanged. This increases the ventricular to artial V2A interval, increasing the detection window for arthythmias. The PAV interval can be shortened in response to a recent history of VSP events.
    • 通过自适应地增加心律失常检测间隔来改善心律失常检测的方法。 一种方法包括增加V2V,整个心脏周期长度,从而降低在心室安全步伐(VSP)存在的起搏速率。 另一种方法包括缩短心房起搏事件之后的触发间隔,在此期间,起搏器将检测V感测事件,同时保持A2V VSP间隔不变,在其结束时将生成任何所需的VSP。 在另一种方法中,缩短了从A速到V步的间隔,PAV间隔,同时保持V2V周期的整体间隔不变。 这将心室增加到术语V2A间隔,增加了心律失常的检测窗口。 可以根据最近的VSP事件历史来缩短PAV间隔。
    • 9. 发明授权
    • Error code calculations for data stored in an implantable medical device
    • 存储在可植入医疗设备中的数据的错误代码计算
    • US6128528A
    • 2000-10-03
    • US271123
    • 1999-03-18
    • James H. EricksenCarl A. SchuVincent E. SplettPaul J. Huelskamp
    • James H. EricksenCarl A. SchuVincent E. SplettPaul J. Huelskamp
    • A61N1/37A61N1/372A61N1/39A61N1/36
    • A61N1/37A61N1/3706A61N1/3956
    • A cyclic redundancy code (CRC) and optionally a syndrome value calculation of one or more implantable medical device (IMD) data block is conducted by block mover/reader hardware of the IMD when the data block(s) are moved and/or read. In the block read operation, each data byte or word in the block mover data register is read in a first clock cycle. In the block move operation, each data byte is read in the first clock cycle in this way and then moved to a destination register in a second clock cycle. The data CRC and optionally the syndrome value accumulate in the CRC and syndrome registers as all data bytes of the data block(s) are read in the first clock cycle. When the last data byte or word of the data block(s) is sequentially read (and moved in the block move operation), the accumulated data CRC and syndrome value are either stored as the associated data CRC and optional syndrome value or are used for comparison with a previously stored data CRC and optional syndrome value associated with the data block(s) in the comparison operation to determine if the data block(s) is corrupted.
    • 当数据块被移动和/或读取时,循环冗余码(CRC)和可选的一个或多个可植入医疗设备(IMD)数据块的综合征值计算由IMD的块移动器/读取器硬件进行。 在块读取操作中,在第一个时钟周期中读取块移动器数据寄存器中的每个数据字节或字。 在块移动操作中,以这种方式在第一个时钟周期读取每个数据字节,然后在第二个时钟周期内移动到目标寄存器。 在第一个时钟周期中读取数据块的所有数据字节,CRC和校验子寄存器中的数据CRC和可选的校正子值累积。 当数据块的最后一个数据字节或字被顺序读取(并在块移动操作中移动)时,累积数据CRC和校正子值被存储为相关数据CRC和可选校验值,或者用于 与先前存储的数据CRC和与比较操作中的数据块相关联的可选校验值进行比较,以确定数据块是否被破坏。