Atrial tracking cardiac stimulator

A - Human Necessities – 61 – N

Patent

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A61N 1/36 (2006.01) A61N 1/362 (2006.01) A61N 1/368 (2006.01)

Patent

CA 2286169

An atrial tracking cardiac stimulator (30) detects atrial activations of a heart (10) through an atrial lead (36) associated with at least one of the atria (12) of the heart, and delivers ventricular pacing pulses to the heart through a ventricular lead (38) associated with at least one of the ventricles (16) of the heart. The stimulator (30) includes a pulse generator (74) including an output stage (92) which delivers a pacing pulse to the atrial lead (36) for detecting atrial activations. A rejectory processor (72) times rejectory time periods responsive to detected atrial activations. The rejectory processor (72) further provides a conducted atrial activation to the pulse generator (74) when a detected atrial activation occurs outside of a rejectory time period.

Ce stimulateur cardiaque synchrone de l'oreillette (30), qui détecte les activations auriculaires (10) par le moyen d'une dérivation auriculaire (36) associée à l'une au moins des oreillettes, fournit des impulsions de stimulation ventriculaire par le moyen d'une dérivation ventriculaire (38) associée à l'un au moins des ventricules (16). Ce stimulateur (30) comporte un générateur d'impulsions (74) pourvu d'un étage de sortie (92) qui fournit une impulsion de stimulation à la dérivation auriculaire (36) aux fins de la détection d'activations auriculaires. Un processeur de réjection (72) mesure les périodes temporelles réagissant aux activations auriculaires détectées. Ce processeur (72) fournit, de plus, une activation auriculaire transmise par conduction au générateur d'impulsions (74) lorsqu'il se produit une activation auriculaire détectée en dehors de la période de réjection.

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