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公开(公告)号：US20220087560A1
公开(公告)日：2022-03-24
申请号：US17027252
申请日：2020-09-21
发明人： Assaf Cohen , Fady Massarwi , Sigal Altman , Gal Bar Zohar , Leonid Zaides
摘要： A system and method for clustering wavefront signals in an electrophysiological map of a cardiac tissue are provided. The system and method include receiving an electrophysiological map of the cardiac tissue, displaying propagation of the wavefront signals as a plurality of velocity vectors, discretizing the received electrophysiological map into a plurality of sections, clustering the velocity vectors into at least one group within each section based on predefined criteria, and generating a trend line representative of each group of clustered velocity vectors within each section in the electrophysiological map.
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公开(公告)号：US20230020372A1
公开(公告)日：2023-01-19
申请号：US17379200
申请日：2021-07-19
发明人： Leonid Zaides , Elad Nakar , Eliyahu Ravuna , Yoav Benaroya , Refael Itah
摘要： A method includes receiving a plurality of data points including electrical activation (EA) values measured at respective positions in at least a portion of a surface of a cardiac chamber of a heart of a patient. Using a predefined EA value criterion, the EA values in a given region of the cardiac surface are classified into multiple distinct EA wave-fronts, and multiple layers of EA values are calculated for the given region, wherein each EA layer includes the EA values found to belong to a respective and contiguous EA wave-front. The multiple EA layers are overlayed on a graphical representation of the surface. The graphical representation with the multiple overlaid EA layers is displayed to a user, with a graphical indication distinguishing between the multiple EA layers.
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公开(公告)号：US20220370794A1
公开(公告)日：2022-11-24
申请号：US17672780
申请日：2022-02-16
发明人： Leonid Zaides , Elad Nakar , Eliyahu Ravuna , Fady Massarwi , Jonathan Yarnitsky , Lior Greenbaum
摘要： A method includes, based on respective signals acquired by a plurality of electrodes on an anatomical surface of a heart, computing respective local activation times (LATs) at respective locations of the electrodes. The method further includes, based on the LATs, computing respective directions of electrical propagation at the locations. The method further includes selecting pairs of adjacent ones of the electrodes such that, for each of the pairs, a vector joining the pair is aligned, to within a predefined threshold degree of alignment, with the direction of electrical propagation at the location of one of the electrodes belonging to the pair. The method further includes associating respective bipolar voltages measured by the pairs of electrodes with a digital model of the anatomical surface. Other examples are also described.
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公开(公告)号：US20220370016A1
公开(公告)日：2022-11-24
申请号：US17672774
申请日：2022-02-16
发明人： Leonid Zaides , Elad Nakar , Eliyahu Ravuna , Yoav Benaroya , Fady Massarwi , Jonathan Yarnitsky , Lior Greenbaum
摘要： A method includes obtaining multiple local activation times (LATs) at different respective measurement locations on an anatomical surface of a heart. The method further includes computing respective directions of electrical propagation at one or more sampling locations on the anatomical surface, by, for each sampling location, selecting a respective subset of the measurement locations for the sampling location, constructing a set of vectors, each of at least some of the vectors including, for a different respective measurement location in the subset, three position values derived from respective position coordinates of the measurement location and an LAT value derived from the LAT at the measurement location, and computing the direction of electrical propagation at the sampling location based on a Principal Component Analysis (PCA) of a 4×4 covariance matrix for the set of vectors. The method further includes indicating the directions of electrical propagation on a display.
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公开(公告)号：US11432755B2
公开(公告)日：2022-09-06
申请号：US17027252
申请日：2020-09-21
发明人： Assaf Cohen , Fady Massarwi , Sigal Altman , Gal Bar Zohar , Leonid Zaides
摘要： A system and method for clustering wavefront signals in an electrophysiological map of a cardiac tissue are provided. The system and method include receiving an electrophysiological map of the cardiac tissue, displaying propagation of the wavefront signals as a plurality of velocity vectors, discretizing the received electrophysiological map into a plurality of sections, clustering the velocity vectors into at least one group within each section based on predefined criteria, and generating a trend line representative of each group of clustered velocity vectors within each section in the electrophysiological map.
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