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    • 66. 发明申请
    • METHOD AND APPARATUS FOR SEPARATION OF VENTRICULAR TACHYCARDIA FROM VENTRICULAR FIBRILLATION FOR IMPLANTABLE CARDIOVERTER DEFIBRILLATORS
    • 用于分离静脉注射器的静脉注射器的方法和装置
    • WO1998005254A1
    • 1998-02-12
    • PCT/US1997014015
    • 1997-08-07
    • THE REGENTS OF THE UNIVERSITY OF MICHIGANCASWELL, Stephanie, A.JENKINS, Janice, M.DICARLO, Lorenzo, A.
    • THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    • A61B05/046
    • A61N1/3956
    • A method and apparatus for differntiating between ventricular tachycardia and ventricular fibrillation includes a pair of electrodes (20, 22) located on a single catheter (12) which, in conjunction with an implantable cardioverter device (14), utilize two channel ventricular algorithms for ventricular tachycardia and ventricular fibrillation separation. Two closely spaced unipolar electrograms demonstrate similar morphology and consistency during rhythms with broad coherent activation (such as sinus rhythm and ventricular tachycardia). Conversely, for incoherent rhythms (ventricular fibrillation and polymorphic ventricular tachycardia), activation between the electrodes proved to be dissimilar and inconsistent. The cross correlation of the two depolarizations measures similarity between electrogram morphology, and interquartile range measures consistency in a passage. The method and apparatus of the present invention is able to address the limitation of existing algorithms and provide accurate separation of ventricular fibrillation from other rhythms.
    • 用于区分室性心动过速和心室颤动的方法和装置包括位于单个导管(12)上的一对电极(20,22),其与可植入式心律转复器装置(14)一起利用用于心室的两个通道心室算法 心动过速和心室颤动分离。 两个紧密间隔的单极电图在具有广泛相干激活(如窦性心律和室性心动过速)的节律中表现出类似的形态和一致性。 相反,对于非相干节律(心室颤动和多形性室性心动过速),电极之间的活化被证明是不相似的和不一致的。 两个去极化的互相关性测量电描记图形态之间的相似性,并且四分位数范围测量通道中的一致性。 本发明的方法和装置能够解决现有算法的局限性,并提供心室颤动与其他节律的精确分离。
    • 68. 发明申请
    • METHOD FOR CARDIAC ARRHYTHMIA DETECTION
    • 心脏心律失常检测方法
    • WO1997039799A1
    • 1997-10-30
    • PCT/US1997006728
    • 1997-04-18
    • THE REGENTS OF THE UNIVERSITY OF MICHIGANSTEVENSON, Shelly, A.JENKINS, Janice, M.THOMPSON, Julie, A.DICARLO, Lorenzo, A.
    • THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    • A61N01/362
    • A61N1/3622A61N1/3962
    • Using only ventricular and atrial rate criteria, there is ambiguity in the case of atrial tachycardia (AT) with retrograde conduction. The introduction of dual chamber sensing in anti-tachycardia devices allows for computational inexpensive measurements of VA intervals. The present invention addresses problems arising in tachycardia with confounding 1:1 relationships. According to the present invention, using atrial and ventricular rates only, all 1:1 tachycardia would be classified as VT, resulting in false shocks. Specificity of ambiguous 1:1 tachycardia can be potentially increased using VA interval measurements (82), at the cost of minimum loss in sensitivity for VT detection. The applied algorithm imposes little in additional computation for dual chamber sensing ICDs and greatly reduces the possibility of false shocks in 1:1 atrial tachycardia.
    • 仅使用心室和心房率标准,在具有逆行传导的房性心动过速(AT)的情况下存在歧义。 在抗心动过速装置中引入双室感测允许计算廉价的VA间隔测量。 本发明解决了以1:1混合关系在心动过速中出现的问题。 根据本发明,仅使用心房和心室率,所有1:1的心动过速将被分类为VT,导致假震荡。 使用VA间隔测量(82)可能潜在地增加模糊1:1心动过速的特异性,以VT检测的灵敏度最小损失为代价。 所应用的算法对双腔感应ICD的附加计算几乎不起作用,并大大降低了1:1心房心动过速的假震动的可能性。
    • 69. 发明申请
    • DEFIBRILLATOR CONTROL SYSTEM
    • 减速器控制系统
    • WO1997039681A1
    • 1997-10-30
    • PCT/US1997006740
    • 1997-04-18
    • THE REGENTS OF THE UNIVERSITY OF MICHIGANMORRIS, Milton, M.JENKINS, Janice, M.DICARLO, Lorenzo, A.
    • THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    • A61B05/046
    • A61B5/7264A61B5/046A61N1/3956Y10S128/92
    • A pattern recognition system for use in an implantable cardioverter defibrillator that is capable of responding correctly to abnormal activity of the heart efficiently and specifically. The system of the present invention first establishes a template representing the point above which or below which actual sample values, as obtained via a sampler (12), would be remarkable. Against the median are compared sampled values within a window having a pre-programmed length. For each cycle, a comparison is made between the template median and every value sampled within this pre-programmed window. Each cycle is then individually diagnosed by a trained classifier (16) such that if a selected value is above a particular pre-established threshold or below a particular pre-established threshold it will be classified as diseased. A plurality of specific cycles must be classified "diseased" in order for a final diagnosis to be made that the individual is experiencing arrhythmia. The system of the present invention is also capable of differentiating between types of disease and can classify the disease as being either ventricular tachycardia or venticular fibrillation.
    • 一种用于植入式心律转复除颤器的模式识别系统,其能够有效且具体地对心脏的异常活动作出正确的响应。 本发明的系统首先建立一个模板,该模板表示在通过采样器(12)获得的实际样本值之上或之下的点以下的点将是显着的。 对于中值,在具有预编程长度的窗口内比较采样值。 对于每个周期,在模板中位数和在此预编程窗口中采样的每个值之间进行比较。 每个周期然后由训练有素的分类器(16)单独诊断,使得如果所选择的值高于特定的预先建立的阈值或低于特定的预先建立的阈值,则将其分类为患病的。 必须将多个特定周期分类为“患病”,以便进行最终诊断以证明个体正在经历心律失常。 本发明的系统还能够区分疾病类型,并且可以将疾病分类为室性心动过速或通气性纤颤。