Table 3.

Mechanisms of postoperative atrial arrhythmia by electrophysiology studies

Findings	n	%
Atrial fibrillation	11	44
Atrioventricular node reentrant tachycardia	3	12
Cavo-tricuspid isthmus-dependent atrial flutter	12	48
Incisional right atrial flutter	6	24
PV focal atrial tachycardia (juxta-anastomotic)	8	32
PV antral reentry (juxta-anastomotic)	5	20
PV antral fibrillation (juxta-anastomotic)	6	24
Roof-dependent atrial flutter	5	20
Perimitral atrial flutter	9	36

Mechanism categories	n	%
Single mechanism	5	20
Multiple mechanisms	20	80
Exclusively right atrial mechanisms	5	20
Left atrial mechanisms	20	80