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Method and system for mapping cardiac activity

A cardiac activity and mapping technology, applied in the field of electrophysiological mapping

Active Publication Date: 2022-03-01
ST JUDE MEDICAL CARDILOGY DIV INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although mapped in and around scars or wall thinning, such as in subjects with ischemic or dilated cardiomyopathy, sharply segmented bipolar potentials representing local near-field activity may appear to be distinct from far-field electrogram fusion

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  • Method and system for mapping cardiac activity
  • Method and system for mapping cardiac activity
  • Method and system for mapping cardiac activity

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Embodiment Construction

[0028] The present disclosure provides methods, devices, and systems for creating electrophysiological maps (eg, electrocardiogram maps) that provide information about heart activity. Certain embodiments of the present disclosure will be explained with reference to the use of bipolar electrograms to create electrophysiological maps of wavelet domain metrics. It should be understood, however, that the teachings herein may be applied in other contexts where it is desired to distinguish local phenomena from far-field phenomena. For example, the teachings herein can be applied to distinguish fetal heart signals from maternal heart signals, or to distinguish local brain activity from more distant brain activity in an electroencephalogram ("EEG").

[0029] figure 1 Shows a schematic diagram of an electrophysiological system 8 for navigating a cardiac catheter and measuring electrical activity occurring in the heart 10 of a patient 11 and three-dimensionally mapping the electrical ...

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Abstract

A scale map of the electrocardiogram can be created by receiving the electrogram, transforming the electrogram to the wavelet domain (e.g., using a continuous wavelet transform), computing at least one energy function of the scale map, and computing a metric of the electrogram using the at least one energy function. At least one metric maps cardiac activity. Electrogram metrics may include, but are not limited to: duration of QRS activity of the electrogram; duration of the near-field component of the electrogram; duration of the far-field component of the electrogram; number of multiple components of the electrogram; The slope of the sharpest component of the electrogram; the scale map width; the energy ratio in the electrogram; and a period length-based measure of the electrogram.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 62 / 301,866, filed March 1, 2016, which is hereby incorporated by reference as if fully set forth herein. technical field [0003] The present disclosure relates to electrophysiological mapping such as may be performed in cardiac diagnostic and therapeutic procedures. In particular, the present disclosure relates to systems, devices, and methods for mapping multi-component cardiac activity. Background technique [0004] Although mapped in and around scars or wall thinning, such as in subjects with ischemic or dilated cardiomyopathy, sharply segmented bipolar potentials representing local near-field activity may appear to be distinct from far-field Electrogram fusion. These sharp potentials typically take one of two morphological forms. In version 1, the near-field potential is separated from the far-field potential by an equipotential line and ext...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/318A61B5/346A61B5/366A61B5/282A61B5/287A61B5/364A61B5/349A61B5/339A61B5/352
CPCA61B5/7203A61B5/7221A61B5/7239A61B5/726A61B5/7264A61B5/349A61B5/364A61B5/339A61B5/352
Inventor J·S·瑞朗V·X·阿方索
Owner ST JUDE MEDICAL CARDILOGY DIV INC