System for classification of tachycardia events

A - Human Necessities – 61 – N

Patent

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A61N 1/39 (2006.01)

Patent

CA 2334819

A system for detecting ventricular tachycardia and supraventricular tachycardia using a multiple stage morphology based system. Cardiac signals are sensed from a patient's heart and analyzed for the occurrence of a tachycardia event. When a tachycardia event is detected, the method and system analyzes a plurality of features of the sensed cardiac signals in two or more discrimination stages. Each of the two or more discrimination stages classify the tachycardia event as either a ventricular tachycardia or a candidate supraventricular tachycardia event. When a discrimination stage detects the occurence of a ventricular tachycardia, therapy is delivered to the heart to treat the ventricular tachycardia.

L'invention se rapporte à un système de détection de tachycardie ventriculaire et de tachycardie supraventriculaire au moyen d'un système morphologique comportant de multiples étapes. On capte les signaux cardiaques provenant du coeur d'un patient et on les analyse afin de déceler la survenue d'un événement tachycardique. Selon le procédé de l'invention, lorsqu'un événement tachycardique est détecté, ledit système analyse une pluralité de caractéristiques des signaux cardiaques captés, au cours d'au moins deux étapes de discrimination. Chacune de ces étapes de discrimination permet de classifier l'événement tachycardique comme étant un événement tachycardique ventriculaire ou un événement tachycardique supraventriculaire. Lorsqu'une étape de discrimination permet de déceler la survenue d'un événement tachycardique ventriculaire, on administre au coeur un traitement thérapeutique de manière à traiter la tachycardie ventriculaire.

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