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Endocardial potential mapping from a noncontact nonexpandable catheter: a feasibility study
1Cardiac Bioelectricity Research and Training Center, Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106-7207, USA.
Annals of Biomedical Engineering
|December 10, 1998
Summary
A novel J-shaped catheter enables accurate single-beat endocardial mapping via percutaneous access. This multielectrode catheter offers robust electrogram reconstruction despite noise and geometric errors.
Area of Science:
- Biomedical Engineering
- Cardiovascular Electrophysiology
Background:
- Previous non-contact probes were too large for percutaneous insertion.
- Accurate endocardial mapping requires detailed electrophysiological data.
Purpose of the Study:
- To assess the feasibility of endocardial mapping using a small, percutaneous multielectrode catheter.
- To evaluate catheter geometry and electrode density for accurate potential reconstruction.
Main Methods:
- Recorded canine left ventricle geometry and endocardial potentials.
- Simulated percutaneous catheter probes with varying geometries (J-shape, straight) and electrode densities.
- Computed probe potentials, added noise and geometric errors, then reconstructed endocardial potentials.
Main Results:
- A 3.0 mm (9F) J-shaped catheter with 60 electrodes performed best for accurate reconstruction.
- Reconstruction was robust to 10% noise and significant geometric errors (3mm shift, 10° rotation).
- A straight 9F catheter performed poorly, highlighting the importance of curved geometry.
Conclusions:
- Accurate single-beat endocardial mapping is feasible with a J-shaped, 9F percutaneous catheter.
- The method's robustness suggests clinical applicability in electrophysiology labs.
- Probe position may be determined using current imaging modalities.