INTERPOLATION OF DYNAMIC THREE-DIMENSIONAL MAPS

    公开(公告)号:EP3205264B1

    公开(公告)日:2018-12-05

    申请号:EP17155561.8

    申请日:2017-02-10

    摘要: A method, including acquiring initial signals from selected positions in a heart, computing respective initial local values of a signal propagation metric at the selected positions, and interpolating the initial local values between the selected positions to compute initial interpolated values of the signal propagation metric at intermediate positions, between the selected positions. The method further includes acquiring subsequent signals from the positions, computing respective subsequent local values of the signal propagation metric at the selected positions, and spatially interpolating the subsequent local values of the signal propagation metric between the selected positions to compute subsequent interpolated values of the signal propagation metric at the intermediate positions. A map of the signal propagation metric is displayed, and when the subsequent interpolated values exceed a bound defined with respect to the initial interpolated values, an indication is provided on the map that the bound has been exceeded.

    AUTOMATIC IDENTIFICATION OF A LOCATION OF FOCAL SOURCE IN ATRIAL FIBRILLATION (AF)

    公开(公告)号:EP3808272A1

    公开(公告)日:2021-04-21

    申请号:EP20192666.4

    申请日:2020-08-25

    IPC分类号: A61B5/318

    摘要: A method includes receiving, via a plurality of electrodes in a heart, a collection of acquisitions, each including a set of electrophysiological (EP) signals measured by the electrodes. A respective direction of arrival (DOA) and a respective distance relative to the electrodes from which the set of EP signals originated are estimated for each acquisition. The acquisitions are aggregated, to form a statistical distribution of the acquisitions as a function of estimated DOA and distance. Using a statistical test, it is checked whether the statistical distribution is consistent, in accordance with a predefined consistency criterion. If the statistical distribution is found consistent, an estimated location in the heart of a focal source of an arrhythmogenic activity that generated the received EP signals is derived from the statistical distribution. The estimated location of the focal source is overlaid on an anatomical map of at least a portion of the heart.

    ERROR ESTIMATION OF LOCAL ACTIVATION TIMES (LAT) MEASURED BY MULTIPLE ELECTRODE CATHETER

    公开(公告)号:EP3785609A1

    公开(公告)日:2021-03-03

    申请号:EP20191576.6

    申请日:2020-08-18

    IPC分类号: A61B5/00

    摘要: A method includes receiving, via a plurality of electrodes in a heart, a collection of acquisitions, wherein each acquisition comprises a set of electrophysiological (EP) signals measured by the electrodes. A respective direction of arrival (DOA) and a respective distance relative to the electrodes from which the set of EP signals originated are estimated for at least some of the acquisitions. Based on the estimated DOA and distance, a timing error is estimated in at least an EP signal among the EP signals. A timing of the EP signal is adjusted to fit the estimated DOA and distance and correct the error. An EP map of at least a portion of the heart is generated using the set of EP signals, including the adjusted EP signal.