Vagal nerve stimulation using vascular implanted devices for...

Details Vagal nerve stimulation using vascular implanted devices for... Vagal nerve stimulation using vascular implanted devices for...

A - Human Necessities

61

N

A61N 1/372 (2006.01) A61N 1/39 (2006.01) A61N 1/36 (2006.01)

Patent

CA 2606237

An abnormally rapid ventricular cardiac rate that results from atrial fibrillation can be reduced by stimulating a vagal nerve of the heart. An apparatus for such stimulation includes a power transmitter that emits a radio frequency signal. A stimulator, implanted in a blood vessel adjacent the vagal nerve, has a pair of electrodes and an electrical circuit thereon. The electrical circuit receives the radio frequency signal and derives an electrical voltage from the energy of that signal. The electrical voltage is applied in the form of pulses to the pair of electrodes, thereby stimulating the vagal nerve. The pattern of that stimulating pulses can be varied in response to characteristics of the atrial fibrillation or the ventricular contractions.

Une fréquence cardiaque ventriculaire anormalement rapide due à une fibrillation atriale peut être réduite par la stimulation d'un nerf vagal du coeur. Un appareil destiné à cette stimulation comprend un émetteur de puissance qui émet un signal de radiofréquence. Un stimulateur, implanté dans un vaisseau cardiaque adjacent au nerf vagal, comporte une paire d'électrodes et un circuit électrique monté sur ceux-ci. Le circuit électrique reçoit le signal de radiofréquence et dérive une tension électrique à partir de l'énergie de ce signal. La tension électrique est appliquée sous la forme d'impulsions à la paire d'électrodes et stimule ainsi le nerf vagal. La configuration de ces impulsions de stimulation peut être modifiée en fonction des caractéristiques de la fibrillation atriale ou des contractions ventriculaires.

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