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Visualizing ablation gaps in vitro using a deflectable fiber optic endocardial visualization catheter.

Abstract

BACKGROUND

The efficacy of pulmonary vein isolation for the treatment of atrial fibrillation may be limited by the ability to make continuous and transmural lesions utilizing an ablation catheter. Gaps often persist between ablation lesions leading to failed electrical isolation and thus failed ablation. Recently, a deflectable fiberoptic endocardial visualization catheter has been introduced for use in imaging the coronary sinus using light in the visible spectrum. We utilize this catheter to visualize the endocardial surface and examine radiofrequency ablation lesions in porcine endocardium to determine the presence of gaps between radiofrequency lesions.

METHODS

Videos were taken of the lesions and shown to two readers who were asked to identify the gaps ranging from less than 0.1 mm-9.8 mm.

RESULTS

Ninety-four lesion gaps were reviewed. The readers demonstrated a combined accuracy of 98.4% at identifying gaps.

CONCLUSIONS

Gaps between ablation lesions can be accurately identified down to less than 1 mm distances in vitro using a direct visualization catheter. Further studies are warranted to confirm these finding in vivo.

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    MeSH

    Animals
    Cardiac Catheterization
    Catheter Ablation
    Endocardium
    Endoscopes
    Equipment Design
    Equipment Failure Analysis
    Fiber Optic Technology
    Surgery, Computer-Assisted
    Swine

    Pub Type(s)

    Evaluation Studies
    In Vitro
    Journal Article

    Language

    eng

    PubMed ID

    19148727