The use of a high definition multielectrode catheter to localize the
trigger for the initiation of atrial fibrillation
Abstract
Mapping of non pulmonary vein triggers for the initiation of atrial
fibrillation can be complex and time consuming. We describe a technique
where templates are created by pacing from different locations with the
right and left atria during sinus rhythm whilst positioning a high
definition (HD) Grid catheter along the posterior wall of the left
atrium and recording the activation sequence. Following this AF is
initiated using decremental atrial pacing and the administration of
intravenous isoprenaline and the activation across the HD Grid is
compared with the templates. In our case series this appears to easily
locate the focus source for the initiation of AF.