Atrial defibrillator and method for providing synchronized...

A - Human Necessities – 61 – N

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A61N 1/39 (2006.01)

Patent

CA 2107147

An implantable atrial defibrillator provides cardioverting electrical energy to the atria of a human heart in need of cardioversion. The atrial defibrillator includes a first detector for detecting ventricular activations of the heart, a second detector for detecting atrial activity of the heart, and an atrial fibrillation detector responsive to the second detector for determining when the atria of the heart are in need of cardioversion. The atrial defibrillator further includes a cardioverter for applying the cardioverting electrical energy to the atria of the heart when the atria of the heart are in need of cardioversion, and a timer delay stage responsive to the first detector for causing the cardioverter to apply the cardioverting electrical energy to the atria of the heart a predetermined delay time after the first detector detects one of the ventricular activations and before the T wave of the heart immediately following the one of the ventricular activations.

Défibrillateur auriculaire interne transmettant un courant électrique dans les oreillettes d'un coeur humain nécessitant une cardioversion. Ce défibrillateur comprend un premier dispositif permettant la détection des activations ventriculaires du coeur, un second dispositif permettant la détection de l'activité auriculaire du coeur, ainsi qu'un détecteur de fibrillation auriculaire sensible au second dispositif et visant à déterminer quand les oreillettes du coeur nécessitent une cardioversion. Le défibrillateur comprend en outre un mécanisme de cardioversion faisant passer, au besoin, un courant électrique dans les oreillettes du coeur ainsi qu'un étage temporisateur sensible au premier dispositif, afin que le mécanisme de cardioversion transmette un courant électrique dans les oreillettes du coeur à un moment prédéterminé après la détection d'une activation ventriculaire par le premier dispositif et avant l'émission de l'onde T du coeur immédiatement après une des activations ventriculaires.

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