Cardiac resynchronization via left ventricular pacing

A - Human Necessities – 61 – N

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A61N 1/368 (2006.01)

Patent

CA 2522583

The invention is directed to synchronizing delivery of pacing pulses to the left ventricle (22) with intrinsic right ventricular depolarizations. An interval between an atrial depolarization and an intrinsic right or left ventricular depolarization (134) is measured. A said plurality of left ventricular pacing intervals are tested and may be around said measured interval (134). One of the pacing intervals is selected (140) based on a measured characteristic of an electrogram that indicates ventricular synchrony such as QRS complex widths (116) and/or Q-T intervals (128). The implantable medical device (16) paces the left ventricle (22) based on the selected pacing interval (140).

L'invention vise à synchroniser l'administration d'impulsions de stimulation cardiaque au ventricule gauche (22), avec des dépolarisations intrinsèques du ventricule droit. Un intervalle entre une dépolarisation auriculaire et une dépolarisation intrinsèque (134) du ventricule droit ou gauche est mesuré. Une pluralité d'intervalles de stimulation cardiaque du ventricule gauche sont testés et peuvent se situer dans une plage de l'ordre de l'intervalle mesuré (134). Un des intervalles de stimulation cardiaque est sélectionné (140) sur la base d'une caractéristique mesurée d'un électrogramme indiquant le synchronisme ventriculaire, tel que les largeurs du complexe QRS (116) et/ou des intervalles Q-T (128). Le dispositif médical implantable (16) stimule le ventricule gauche (22), sur la base de l'intervalle de stimulation sélectionné (140).

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