Apparatus for terminating tachycardia

A - Human Necessities – 61 – N

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A61N 1/368 (2006.01) A61N 1/362 (2006.01) A61N 1/39 (2006.01)

Patent

CA 2102492

An implantable cardioverter including two electrodes for sensing depolarizations of a chamber of a patient's heart. one, electrode providing a near field signal, one electrode providing a far field signal. The device defines a desired cardioversion pulse delivery time as a first time interval following the onset of the far field signal. The device measures a second time interval between the onset of the far field signal and the detection of the near field signal, and delivers the cardioversion pulse synchronized to the detection of the near field signal, using the first and second time intervals to define a synchronization interval following detection of the near field electrogram.

Défibrillateur interne comprenant deux électrodes pour la détection de dépolarisations au niveau d'une cavité cardiaque d'un patient, une électrode fournissant un signal de champ proche, une autre électrode transmettant un signal de champ lointain. Ce dispositif définit un temps voulu de transmission d'une impulsion de cardioversion comme premier intervalle de temps suivant le début du signal de champ lointain. Le dispositif mesure un second intervalle de temps entre le début du signal de champ lointain et la détection du signal de champ proche, et il transmet l'impulsion de cardioversion en synchronisation avec la détection du signal de champ proche. Le premier et le second intervalles servent à définir un intervalle de synchronisation suivant la détection de l'électrogramme de champ proche.

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