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. Author manuscript; available in PMC: 2012 Sep 4.
Published in final edited form as: Heart Rhythm. 2012 Mar 28;9(9):1436–1439. doi: 10.1016/j.hrthm.2012.03.055

Figure 2.

Figure 2

Left trial FIRM mapping and ablation of reinduced AF. This AF required vigorous reinduction to be sustained after right atrial FIRM. A: Basket and ablation catheters in the left atrium during AF (right anterior oblique 30o fluoroscopy). B: Counterclockwise rotor in midposterior left atrium, with collision beyond spiral arms (indicated by double lines). Pulmonary vein ostia indicated by dashed lines. C: Electrograms around the LA rotor showing counterclockwise rotation with variability. D: FIRM ablation at the LA rotor terminates AF to sinus rhythm (4.75 minutes). ABL = ablation electrogram; AF = atrial fibrillation; CS = coronary sinus; FIRM = focal impulse and rotor modulation; LA = left atrial.