Preferred adi/r: a permanent pacing mode to eliminate...

A - Human Necessities – 61 – N

Patent

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A61N 1/37 (2006.01) A61N 1/368 (2006.01)

Patent

CA 2498887

A preferred atrial-based pacing method and apparatus is provided using an intelligent cardiac pacing system to having the ability to continue atrial- based pacing as long as relatively reliable AV conduction is present. In the event that such relatively reliable AV conduction is not present, mode switching to a DDD/R or a DDI/R pacing mode while continually biased to mode switch back to atrial-based pacing. The standard or relatively reliable AV conduction may be changed either automatically or manually. This increases pacing that utilizes natural AV conduction however possible so as to gain all the benefits of cardiac contractile properties resulting therefrom, while tolerating the occasional missed ventricular depolarization (i.e., non- conducted P-wave). In the event where relatively reliable AV conduction is not present, the pacing mode is switched to a DDD/R mode while detecting a return of the relatively reliable AV conduction (and resulting mode switch to preferred atrial based pacing).

L'invention concerne une méthode et un appareil préférés de stimulation atriale utilisant un système de stimulateur cardiaque intelligent pouvant continuer à effectuer une stimulation atriale aussi longtemps qu'une conduction auriculo-ventriculaire (AV) est détectée. Dans le cas où une conduction relativement fiable n'est pas détectée, le mode de stimulation passe au mode DDD/R ou DDI/R tout en sollicitant de manière continue le retour au mode de stimulation atriale. La conduction AV normalisée ou relativement fiable peut être modifiée soit automatiquement soit manuellement, ce qui permet d'accroître une stimulation utilisant une conduction AV naturelle, quand cela est possible, afin d'obtenir tous les bénéfices des propriétés de contraction cardiaque qui en résultent, tout en tolérant une dépolarisation ventriculaire occasionnelle manquée (c'est-à-dire une onde P non émise par conduction). Dans le cas où cette conduction relativement fiable est bloquée, le mode de stimulation passe en mode DDD/R tout en détectant un retour à une conduction AV relativement fiable (et le retour qui en résulte à la stimulation atriale préférée).

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