TABLE 4.

Procedural characteristics of empirical and non-empirical superior vena cava (SVC) isolation groups.

	Empirical SVC isolation (n = 29)	Non-empirical SVC isolation (n = 30)	p-value
Low voltage in LA n (%)	13 (44.8)	19 (63.3)	0.154
Anterior wall n (%)	12 (41.4)	16 (53.3)	0.358
Posterior wall n (%)	2 (6.9)	6 (20.0)	0.142
Roof n (%)	5 (17.2)	8 (26.7)	0.383
Septum n (%)	3 (10.3)	1 (3.3)	0.284
Substrate modification n (%)	9 (31.0)	16 (53.3)	0.083
Linear ablation n (%)	10 (54.5)	20 (66.7)	0.013
Anterior wall n (%)	6 (20.7)	16 (53.3)	0.010
Posterior wall n (%)	3 (10.3)	4 (13.3)	0.723
Roof n (%)	6 (20.7)	8 (26.7)	0.590
CTI n (%)	8 (27.6)	12 (40.0)	0.314
AT n (%)	6 (20.7)	21 (70.0)	<0.001
Roof-dependent reentry n (%)	0 (0.0)	6 (20.0)	0.011
MA-dependent reentry n (%)	1 (3.4)	11 (36.7)	0.002
TA-dependent reentry n (%)	2 (6.9)	1 (3.3)	0.533
Focal n (%)	2 (6.9)	2 (6.7)	0.972
Non-PV triggers n (%)	4 (13.8)	1 (3.3)	0.149
FO trigger (%)	2 (6.9)	1 (3.3)	0.533
CT trigger (%)	2 (6.9)	0 (0.0)	0.305

AT, atrial tachycardia; CT, crista terminalis; CTI, cavo-tricuspid isthmus; FO, fossae ovalis; LA, left atrium; MA, mitral annulus; SVC, superior vena cava; TA, the tricuspid annulus.