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Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

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Are the virtual lines created with the EnSite electroanatomical mapping system really continuous?

Thais Nascimento, Fernanda Mota, Luis Felipe Neves dos Santos

Arquivos Brasileiros De Cardiologia

|June 15, 2013

Summary

The EnSiteNavX system creates virtual lines for atrial fibrillation ablation that accurately correspond to continuous, transmural lesions in swine models. This electroanatomic mapping system is suitable for linear ablation procedures.

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Area of Science:

Cardiology
Electrophysiology
Medical Devices

Background:

Radiofrequency (RF) atrial fibrillation ablation utilizes the EnSiteNavX electroanatomic mapping system for creating linear lesions.
The accuracy of EnSite-guided virtual lines compared to actual pathological lesions requires evaluation.

Purpose of the Study:

To assess the continuity and accuracy of virtual lines generated by the EnSite system in a swine model.
To validate the EnSite system's capability in guiding linear ablation for atrial fibrillation.

Main Methods:

Radiofrequency ablation linear lesions were created in the atria of 14 swine using 8mm and irrigated tip catheters guided by the EnSite system.
Animals were sacrificed 14 days post-ablation for macroscopic and histological analysis of the lesions.

Main Results:

A total of 44 linear lesions were created and analyzed.
All created lesions demonstrated epicardial and endocardial continuity and transmurality.
Macroscopic examination revealed continuous lesions averaging 3.61 cm in length and 0.71 cm in depth.
High correlation (90.4-91.3%) was observed between virtual line placement and anatomical lesion location.

Conclusions:

Virtual lines generated by the EnSiteNavX system correspond to continuous, transmural linear lesions in anatomical specimens.
The EnSite system is suitable for guiding linear ablation in atrial fibrillation treatment.
This study validates the EnSite system's precision in creating anatomically accurate lesions.