Prognostic factors of atrial fibrillation following elective coronary artery bypass grafting: the impact of quantified intraoperative myocardial ischemia

Table 4 Impact of intra and postoperative parameters on the occurrence of post-CABG atrial fibrillation

Characteristic	Group A (AF)	Group B (no AF)	Significance (p)
	157 patients	191 patients
CPB-time
< 60 min	12	23	NS
60-120 min	101	136	NS
> 120 min	44	32	p = 0.011
M.I.I (ml.m ² /Kg.min)
av.MII _ante ≥ 0.5	40	64	NS
av.MII _ante 0.28 - < 0.49	77	99	NS
av.MII _ante ≤ 0.27	40	28	p = 0.011
CABG
1 graft	11	13	NS
2 grafts	46	56
3 grafts	96	114
4 grafts	4	8
LIMA use	145	167	NS
Positive fluid balance	114	93	p < 0.001
Potassium deficit	118	158	NS
FiO ₂ /PO ₂
≤ 40	129	173	NS
> 40	28	18	p = 0.021
Inotropic support
No	100	135	NS
3-15 μg/kg/min	24	38	NS
> 15 μg/kg/min	33	18	p = 0.016
Perioperative MI	16	3	p < 0.001
ICU-recovery
≤ 48 hours	109	170	NS
> 48 hours	48	21	p < 0.001

CPB: Cardiopulmonary Bypass, M.I.I: Myocardial Ischemia Index, CABG: Coronary Artery Bypass Grafting, LIMA: left internal thoracic (mammary) artery, FiO₂: fraction of delivered O₂, PO₂: arterial partial pressure of O₂, MI: Myocardial Infarction, ICU: Intensive Care Unit, NS: not statistically significant (p > 0.05)

ISSN: 1749-8090