Non-invasive determination of left-ventricular pressure

A - Human Necessities – 61 – B

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A61B 5/00 (2006.01) A61B 5/02 (2006.01) A61B 5/021 (2006.01) A61B 5/0456 (2006.01) A61B 7/04 (2006.01)

Patent

CA 2474789

A system (10) non-invasively obtains a left-ventricular pressure waveform by acquiring pressure waveforms from first and second pressure measurements using a first group (12) of non-invasive pressure measurement devices. Selectors (70 and 72) each select a segment form each of the first and second pressure waveforms. Each segment is associated with a different interval of a cardiac cycle. The shifter (74) then time-shifts the segments by an amount indicative of a relative time of occurrence of each of the first and second segments.

La présente invention concerne un système (10) qui permet d'obtenir de façon non invasive la courbe qui représente la pression qui règne dans le ventricule gauche, par l'acquisition de courbes de pression à partir d'une première et d'une seconde mesure au moyen d'un premier groupe (12) de dispositifs de mesure de pression non invasive. Des dispositifs de sélections (70 et 72) sélectionnent chacun un segment de chacune des première et seconde courbes de pression. Chaque segment est associé à un intervalle différent d'un cycle cardiaque. Le dispositif de déphasage (74) réalise alors le déphasage des segments d'une valeur qui est représentative d'un temps relatif entre l'apparition de chacun des premier et second segments.

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