Identification and acute targeting of gaps in atrial ablation lesion sets using a real-time magnetic resonance imaging system.

ABSTRACT:

Background

Radiofrequency ablation is routinely used to treat cardiac arrhythmias, but gaps remain in ablation lesion sets because there is no direct visualization of ablation-related changes. In this study, we acutely identify and target gaps using a real-time magnetic resonance imaging (RT-MRI) system, leading to a complete and transmural ablation in the atrium.

Methods and results

A swine model was used for these studies (n=12). Ablation lesions with a gap were created in the atrium using fluoroscopy and an electroanatomic system in the first group (n=5). The animal was then moved to a 3-tesla MRI system where high-resolution late gadolinium enhancement MRI was used to identify the gap. Using an RT-MRI catheter navigation and visualization system, the gap area was ablated

SUBMITTER: Ranjan R 

PROVIDER: S-EPMC3691079 | biostudies-literature | 2012 Dec

REPOSITORIES: biostudies-literature