Biatrial tachycardia utilizing Bachmann bundle

A 69-year-old woman with a history of pulmonary vein isolation for paroxysmal atrial fibrillation (AF) was admitted for recurrence of AF. After reisolation of the left superior pulmonary vein and posterior wall isolation, low-voltage electrograms on the anterior wall were ablated during AF. During the radiofrequency application, AF was organized into biatrial tachycardia (BiAT) (Supplemental Video). The activation map of BiAT showed a counterclockwise circuit using most of the mitral annulus in the left atrium (LA) (including the coronary sinus but not the LA septum) and right atrial (RA) septum with 2 interatrial connections.
Source: Heart Rhythm - Category: Cardiology Authors: Tags: Image Source Type: research