. Author manuscript; available in PMC: 2014 Jul 9.

Published in final edited form as: J Am Coll Cardiol. 2013 Apr 3;62(2):138–147. doi: 10.1016/j.jacc.2013.03.021

Table 2.

Results of FIRM Mapping

Characteristic	Any Source Ablation (n=61)	No Source Ablation (n=33)	P
No. Concurrent Sources/patient	2.3±1.1	1.8±0.6	0.02
Left Atrial Sources	107 (69.9%)	31 (58.5%)	0.13
Right Atrial Sources	46 (30.1%)	22 (41.5%)	0.13
Left Atrial Sources
Rotors	73 (47.7%)	27 (50.9%)	0.03
Focal Sources	34 (22.2%)	4 (7.5%)	0.03
Near Pulmonary Veins	37/153 (24.2%)	10/53 (18.9%)	0.28
Left Atrial Roof	28/153 (18.3%)	5/53 (9.4%)	0.08
Right Atrial Sources
Rotors	42 (27.5%)	21 (39.6%)	1.00
Focal Sources	4 (2.6%)	1 (1.9%)	1.00
Lateral/Posterior	34/153 (22.2%)	15/53 (28.3%)	0.77
Medial/septal	12/153 (7.8%)	7/53 (13.2%)	0.77

Values are mean ± SD or n(%) compared with t-tests or Fisher exact, respectively.