Systems and methods for making noninvasive assessments of...

A - Human Necessities – 61 – B

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A61B 5/05 (2006.01) A61B 5/00 (2006.01) A61B 6/00 (2006.01) A61B 8/00 (2006.01) A61B 8/06 (2006.01) A61B 8/08 (2006.01) A61B 8/12 (2006.01) A61B 8/14 (2006.01) A61M 16/00 (2006.01) G01N 24/00 (2006.01)

Patent

CA 2490999

Systems and methods for noninvasive assessment of cardiac tissue properties and cardiac parameters using ultrasound techniques are disclosed. Determinations of myocardial tissue stiffness, tension, strain, strain rate, and the like, may be used to assess myocardial contractility, myocardial ischemia and infarction, ventricular filling and atrial pressures, and diastolic functions. Non-invasive systems in which acoustic techniques, such as ultrasound, are employed to acquire data relating to intrinsic tissue displacements are disclosed. Non-invasive systems in which ultrasound techniques are used to acoustically stimulate or palpate target cardiac tissue, or induce a response at a cardiac tissue site that relates to cardiac tissue properties and/or cardiac parameters are also disclosed.

L'invention concerne des systèmes et des procédés d'évaluation non invasive des propriétés d'un tissu cardiaque et de paramètres cardiaques par des techniques faisant appel aux ultrasons. Des déterminations concernant la rigidité, la tension, la dilatation, la vitesse de dilatation et analogue du tissu myocardique peuvent être utilisées pour évaluer la contractilité myocardique, l'ischémie myocardique et l'infarctus du myocarde, la pression de remplissage des ventricules et de l'oreillette, et les fonctions diastoliques. L'invention concerne également des systèmes non invasifs dans lesquels des techniques acoustiques, telles que des techniques mises en oeuvre par ultrasons, sont utilisées pour acquérir des données relatives à des déplacements de tissu intrinsèque. L'invention concerne en outre des systèmes non invasifs dans lesquels des techniques faisant appel aux ultrasons sont utilisées pour stimuler ou palper acoustiquement un tissu cardiaque cible, ou pour induire, au niveau d'un site cardiaque, une réponse se rapportant à des propriétés du tissu cardiaque et/ou des paramètres cardiaques.

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