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Summary
This summary is machine-generated.

Local coaxial electrograms improve activation mapping precision over bipolar electrograms. Hexagonal electrode grids enable efficient creation of triangular references for superior coaxial electrogram recording and analysis.

Keywords:
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Area of Science:

  • Biomedical Engineering
  • Cardiac Electrophysiology

Background:

  • Bipolar electrograms are common for activation mapping but have limitations.
  • Local coaxial reference electrograms offer potential advantages for mapping.
  • Current methods for coaxial electrograms may require complex electrode configurations.

Purpose of the Study:

  • To evaluate the utility of coaxial electrograms using a novel local reference.
  • To assess the feasibility of creating local references with hexagonal multielectrode grids.
  • To compare coaxial electrograms with traditional bipolar electrograms for activation mapping.

Main Methods:

  • Development of a custom multielectrode with triangular and cross-shaped local references.
  • Recording and analysis of coaxial and bipolar electrograms.
  • Comparison of electrogram morphology and activation time based on electrode orientation and reference type.

Main Results:

  • Triangular and cross-shaped local references yielded similar coaxial electrogram recordings.
  • Coaxial electrogram morphology was independent of electrode orientation relative to the activation front.
  • Activation times from coaxial electrograms closely matched local activation times.
  • Coaxial electrograms demonstrated advantages over bipolar electrograms in mapping.

Conclusions:

  • Local coaxial electrograms, particularly when recorded using hexagonal multielectrode grids, offer enhanced precision for activation mapping.
  • The described method provides a more robust and potentially more efficient approach to clinical activation mapping.
  • Hexagonal multielectrode designs represent a promising advancement for cardiac electrophysiology mapping.