Biatrial Tachycardia Utilizing Bachmann ’s Bundle

A 69-year-old-woman with a history of pulmonary vein (PV) isolation for paroxysmal atrial fibrillation (AF) was admitted for recurrence of AF. After reisolation of the left superior PV and posterior wall isolation, low-voltage electrograms on the anterior wall were ablated during AF. During the radiofrequency application, AF was organized into a biatrial tachycardia (BiAT) (Supplemental video). The activation map of BiAT showed a counter-clockwise 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 two interatrial connections.
Source: Heart Rhythm - Category: Cardiology Authors: Source Type: research