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    • 4. 发明授权
    • System and method for classifying tachycardia arrhythmias having 1:1 atrial-to-ventricular rhythms
    • 具有1:1心房至心室节律的心动过速心律失常分类系统和方法
    • US07203535B1
    • 2007-04-10
    • US09417558
    • 1999-10-13
    • William HsuRobert J. SweeneyEric G. Lovett
    • William HsuRobert J. SweeneyEric G. Lovett
    • A61B5/0402
    • A61N1/3622A61N1/3962
    • An implantable cardioverter/defibrillator includes a tachycardia detection system that detects one-to-one (1:1) tachycardia, which is a tachycardia with a one-to-one relationship between atrial and ventricular contractions. When the 1:1 tachycardia is detected, the system discriminates ventricular tachycardia (VT) from supraventricular tachycardia (SVT) based on analysis of a cardiac time interval. Examples of the cardiac time interval include an atrioventricular interval (AVI) and a ventriculoatrial interval (VAI). A template time interval is created during a known normal sinus rhythm. The system measures a tachycardia time interval after detecting the 1:1 tachycardia, and indicates a VT detection if the tachycardia time interval differs from the template time interval by at least a predetermined percentage of the template time interval.
    • 用于区分沿逆行方向发生的心律的顺行方向发生的心律的系统和方法。 感觉心房去极化和心室去极化。 当检测到心房去极化与心脏去极化具有一对一关联的心动过速发作时,测量心室去极化与第一预定心脏事件之间的第一间隔以及心房去极化和第二预定心脏事件之间的第二间隔。 然后将第一和第二间隔的特征用于将心动过速发作分类为顺行节律或逆行节律。