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    • 10. 发明申请
    • METHOD AND APPARATUS FOR EVALUATING VENTRICULAR PERFORMANCE DURING ISOVOLUMIC CONTRACTION
    • 评价异体收缩时心室功能的方法和装置
    • WO2006104869A2
    • 2006-10-05
    • PCT/US2006/010713
    • 2006-03-23
    • MEDTRONIC, INC.HETTRICK, Douglas, A.EULER, David, E.
    • HETTRICK, Douglas, A.EULER, David, E.
    • A61N1/362A61B8/00
    • A61N1/3627A61B8/0858A61N1/36528A61N1/3684
    • A method of evaluating ventricular performance of a heart employing sensors to measure a ventricular dimension signal and deriving indices of ventricular performance therefrom. Premature Shortening (PS) and Isovolumic Lengthening (IL) comprise two indices of ventricular performance determined from analysis of the left ventricular dimension signal during the transition from ventricular filling to ventricular ejection. Measured values of PS and IL are compared to other measured values or reference values to determine if ventricular performance has improved (or worsened). In some embodiments, the dimension sensors may comprise piezoelectric sonomicrometer crystals that operate as ultrasound transmitters and receivers. The sensors may be mounted in relation to a ventricle of the heart either temporarily or permanently, and may be configured either separately from or integrally with cardiac pacing leads.
    • 一种使用传感器来测量心室尺寸信号并由此导出心室性能指标的心脏心室性能评估方法。 过早缩短(PS)和等容延长(IL)包括从心室充盈过渡到心室射血期间通过分析左心室尺寸信号确定的两个心室性能指标。 将PS和IL的测量值与其他测量值或参考值进行比较以确定心室功能是否得到改善(或恶化)。 在一些实施例中,尺寸传感器可以包括作为超声波发射器和接收器操作的压电超声微结晶体。 传感器可临时或永久地相对于心脏的心室安装,并且可以与心脏起搏导线分开或整体配置。