Table 3. Anatomical variation of PV in the PAF and non-PAF groups.

	Total	PAF	non-PAF
Patients, n	118	73	45
Left common trunk
Total	29 (24.5)	17 (23.2)	12 (24.4)
Long left common trunk > 1 cm	3 (2.5)	2 (2.7)	1 (2.2)
Accessary vein
Right middle PV	28 (23.7)	15 (20.5)	13 (28.9)
Left middle PV	1 (0.9)	1 (1.4)	0 (0.0)
Upper PV	2 (1.7)	1 (1.4)	1 (2.2)

Data are n (%). non-PAF, non-paroxysmal atrial fibrillation; PAF, paroxysmal atrial fibrillation; PV, pulmonary vein

The upper PV was an anomalous vein distinct from the superior PV.