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    • 7. 发明授权
    • Capture threshold measurement for selection of pacing vector
    • 拍摄阈值测量用于选择起搏矢量
    • US08718770B2
    • 2014-05-06
    • US12909057
    • 2010-10-21
    • Wade M. DemmerTodd J. Sheldon
    • Wade M. DemmerTodd J. Sheldon
    • A61N1/08
    • A61N1/3712A61N1/3686
    • Various techniques for selecting a pacing vector based on pacing capture thresholds are described. One example method described includes for each of a plurality of vectors, iteratively delivering at least one pacing stimulus at each of a plurality of magnitudes within a predetermined range of magnitudes to a first chamber, determining if a depolarization occurred in a second chamber of the heart within a predetermined threshold time interval after the pacing stimulus that is less than an interval, identifying a pacing stimulus for which a depolarization in the second chamber does not occur within the predetermined threshold time interval, determining a capture threshold magnitude for the vector based on the magnitude of the pacing pulse for which a depolarization in the second chamber does not occur within the predetermined threshold time interval, and recording the capture threshold magnitudes.
    • 描述了基于起搏捕获阈值来选择起搏向量的各种技术。 所描述的一个示例性方法包括针对多个向量中的每一个,在预定范围内的多个量级中的每一个向第一室迭代递送至少一个起搏刺激,确定是否在心脏的第二腔室中发生去极化 在所述起搏刺激小于间隔之后的预定阈值时间间隔内,识别在所述预定阈值时间间隔内不发生所述第二腔室中去极化的起搏刺激,基于所述步骤确定所述矢量的捕获阈值量值 在预定的阈值时间间隔内在第二腔室中去极化的起搏脉冲的幅值,并记录捕获阈值量值。
    • 9. 发明申请
    • METHODS FOR SETTING CARDIAC PACING PARAMETERS IN RELATIVELY HIGH EFFICIENCY PACING SYSTEMS
    • 在相对高效率的PACING系统中设置心脏参数的方法
    • US20130030493A1
    • 2013-01-31
    • US13193783
    • 2011-07-29
    • Todd J. SheldonWade M. Demmer
    • Todd J. SheldonWade M. Demmer
    • A61N1/37
    • A61N1/3712A61N1/3708A61N1/37205A61N1/3756
    • According to some methods, for example, preprogrammed in a microprocessor element of an implantable cardiac pacing system, at least one of a number of periodic pacing threshold searches includes steps to reduce an evoked response amplitude threshold for evoked response signal detection. The reduction may be to a minimum value measurable above zero, for example, as determined by establishing a ‘noise floor’. Alternately, amplitudes of test pacing pulses and corresponding post pulse signals are collected and reviewed to search for a break, to determine a lower value to which the evoked response threshold may be adjusted without detecting noise. Subsequent to reducing the threshold, if no evoked response signal is detected for a test pulse applied at or above a predetermined maximum desirable pulse energy, an operational pacing pulse energy is set to greater than or equal to the maximum desirable in conjunction with a reduction in pacing rate.
    • 根据一些方法,例如,在可植入心脏起搏系统的微处理器元件中预编程,多个周期性起搏阈值搜索中的至少一个包括减少诱发响应信号检测的诱发响应振幅阈值的步骤。 该减小可以是在零以上可测量的最小值,例如通过建立噪声本底来确定。 或者,收集和检查测试起搏脉冲和对应的后脉冲信号的振幅以搜索中断,以确定可以在不检测噪声的情况下调整诱发响应阈值的较低值。 在降低阈值之后,如果对于在预定的最大期望脉冲能量之上或之上施加的测试脉冲没有检测到诱发响应信号,则可以将运行起搏脉冲能量设置为大于或等于期望的最大值, 起搏率