Table 3.

Histological evaluation of right atrium.

	All Patients N = 100	POAF N = 38	No POAF N = 62	p Value
Fibrosis				0.001
Grade 0	18 (18%)	0 (0%)	18 (29.0%)
Grade 1	34 (34%)	6 (15.8%)	28 (45.2%)
Grade 2	23 (23%)	12 (31.6%)	11 (17.7%)
Grade 3	25 (25%)	20 (52.6%)	5 (8.1%)
Fibrosis grade ≥ 2	48 (48%)	32 (84.2%)	16 (25.8%)	0.001
Angiogenesis				0.018
Grade 0–1	0 (0%)	0 (0%)	0 (0%)
Grade 2	62 (62%)	18 (47.4%)	44 (71.0%)
Grade 3	38 (38%)	20 (52.6%)	18 (29.0%)
Inflammation				0.033
Grade 0	44 (44%)	14 (36.8%)	30 (48.4%)
Grade 1	47 (47%)	17 (44.7%)	30 (48.4%)
Grade 2	9 (9%)	7 (18.4%)	2 (3.2%)

POAF: postoperative atrial fibrillation.