Method and apparatus for detecting myocardial electrical...

A - Human Necessities – 61 – N

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A61N 1/365 (2006.01) A61N 1/362 (2006.01)

Patent

CA 2524050

An implantable system and method are provided for detecting myocardial electrical recovery time and for controlling the delivery of cardiac stimulation pulses relative to the detected recovery time. One or more fiducial points on a T-wave signal sensed from one or more intracardiac EGM or subcutaneous ECG signals are detected for estimating myocardial recovery time. Extra systolic stimulation pulses are delivered at an extra systolic interval based on a detected recovery time to effectively produce post-extra systolic potentiation while preventing delivery of extra systolic stimuli during the vulnerable period.

La présente invention a trait à un système implantable et un procédé pour la détection de temps de récupération électrique myocardique et pour le contrôle de la délivrance d'impulsions de stimulation cardiaques en fonction du temps de récupération détecté. Un ou plusieurs points fiduciels sur un signal d'onde T capté à partir d'un ou de plusieurs signaux d'électrogramme intracardiaque ou d'électrocardiogramme sous-cutané sont détectés pour l'estimation du temps de récupération myocardique. Des impulsions de stimulation extra-systoliques sont délivrées à un intervalle extra-systolique basé sur le temps de récupération détecté pour la production effective de potentialisation post-extra systolique tout en empêchant la délivrance de stimuli extra-systoliques lors de la période vulnérable.

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