Method and apparatus for temporarily varying a parameter in...

A - Human Necessities – 61 – N

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A61N 1/365 (2006.01)

Patent

CA 2529783

A method and apparatus for varying a parameter in an implantable medical device that includes a plurality of electrodes stimulating heart tissue and sensing cardiac signals, a timing and control device controlling the stimulation of heart tissue by the plurality of electrodes and measuring intervals between the sensed cardiac signals, a storage device storing the measured intervals, and a microprocessor. The microprocessor determines heart rate variability in response to the stored intervals, compares the determined heart rate variability to a predetermined target rate profile, adjusts the parameter from a first setting to a second setting different from the first setting in response to the comparing of the determined heart rate variability and the predetermined target rate profile, and adjusts the parameter from the second setting to a termination setting in response to a termination event or expiration of a first predetermined time period.

L'invention porte sur un procédé et un appareil permettant de faire varier un paramètre de dispositif médical implantable comportant: plusieurs électrodes de stimulation des tissus du coeur et de détection des signaux du coeur; un dispositif de temporisation et de commande de la stimulation des tissus du coeur par les électrodes et mesurant les intervalles entre les signaux du coeur détectés; un dispositif de stockage des intervalles mesurés; et un microprocesseur. Le microprocesseur: détermine les variations du rythme cardiaque en réponse aux intervalles stockés; compare lesdites variations à un profil cible de rythme prédéterminé; ajuste les paramètres d'un premier réglage pour produire un deuxième réglage en réponse à la susdite comparaison et au susdit profil; et ajuste le paramètre du deuxième réglage pour produire un réglage final en réponse à un événement d'arrêt ou à l'expiration d'une première période prédéterminée.

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