Method and apparatus for discrimination of atrial...

A - Human Necessities – 61 – N

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A61N 1/37 (2006.01) A61B 5/0452 (2006.01) A61N 1/362 (2006.01) A61B 5/046 (2006.01)

Patent

CA 2430172

A method and apparatus for method for discriminating heart rhythms includes computing a first predetermined number of RR intervals from received QRS intervals, and computing a median RR interval corresponding to a predetermined number of the first predetermined number of RR intervals. A predetermined beat- to-beat variation and a corresponding predetermined count are determined based on the computed median RR interval. Beat-to-beat variation differences between the first predetermined number of RR intervals are computed and a determination is made as to whether the computed beat-to-beat variation differences are greater than the predetermined beat-to-beat variation, and as to whether a number of the computed beat-to-beat variation differences that are greater than the predetermined beat-to-beat variation is greater than the predetermined count. The heart rhythm is identified as an irregular rhythm in response to the number being greater than or equal to the predetermined count.

L'invention concerne un procédé et un appareil permettant de différencier les rythmes cardiaques, qui consistent à calculer un premier nombre prédéterminé d'intervalles RR à partir des intervalles QRS reçus, et à calculer un intervalle RR médian correspondant à un nombre prédéterminé du premier nombre prédéterminé d'intervalles RR. Une variation prédéterminée de battement à battement et une valeur de comptage prédéterminée correspondant sont déterminées sur la base de l'intervalle RR médian calculé. Les différences de variation de battement à battement entre le premier nombre prédéterminé d'intervalles RR sont calculés; on établit alors si ces différences calculées sont supérieures à la variation de battement à battement prédéterminée, et si certaines de ces différences calculées, qui sont supérieures à ladite variation, sont également supérieures à la valeur de comptage prédéterminée. Le rythme cardiaque est identifié comme étant irrégulier en réponse au nombre qui est supérieur ou égal à la valeur de comptage prédéterminée.

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