Pacing with hemodynamic enhancement

Details Pacing with hemodynamic enhancement Pacing with hemodynamic enhancement

A - Human Necessities

61

N

A61N 1/362 (2006.01)

Patent

CA 2338201

Apparatus (170) for heart pacing with hemodynamic improvement, including one or more electrodes (36), which convey electrical signals to respective cardiac muscle segments. Signal generation circuitry (50) applies an extended pacing signal (60, 61), having an overall duration greater than three times a chronaxie time, to the one or more electrodes so as to pace the heart. The signal preferably includes a train of a plurality of biphasic pulses, and has an amplitude at least three times as great as a threshold for pacing the heart, but not sufficient for cardioversion.

L'invention concerne un appareil (170) à effet hémodynamique amélioré permettant de stimuler le coeur, qui comprend une ou plusieurs électrode(s) (36) transportant des signaux électriques vers des segments de muscle cardiaque respectifs. Un circuit (50) de production de signaux applique des signaux ( 60, 61) de stimulation cardiaque étendus, dont la durée globale est trois fois supérieure au temps de chronaxie, aux électrodes de façon à stimuler le coeur. Ces signaux comprennent, de préférence, un train de plusieurs impulsions biphase, présentent une amplitude d'au moins trois fois supérieure à un seuil de stimulation du coeur, mais qui reste toutefois insuffisante pour rétablir le rythme cardiaque.

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