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

Table 2 Patients' intra and postoperative characteristics

Characteristic	Number of patients	Percentage
CPB-time: 98 ± 13 min (43-158)
CPB-time < 60	35	10%
CPB-time 60-120 min	237	68.10%
CPB-time > 120 min	76	21.90%
Ischemia time: 47 ± 16 min (16-79)
Myocardial Ischemia Index (M.I.I): 0.1- 1.0 ml.m ² /Kg.min
av.MII _ante ≥ 0.5 ml.m²/Kg.min	104	29.90%
av.MII _ante 0.28 - < 0.49 ml.m²/Kg.min	176	50.60%
av.MII _ante ≤ 0.27 ml.m²/Kg.min	68	19.50%
Bypasses performed
CABG-1	24	6.90%
CABG-2	102	29.30%
CABG-3	210	60.40%
CABG-4	12	3.40%
LIMA use	312	89.70%
Positive fluid balance	207	59.50%
Potassium Deficit	276	79.30%
FiO ₂ /PO ₂
≤ 40	302	86.80%
> 40	46	13.20%
Inotropic support
Absent	235	67.50%
3-15 μg/kg/min	62	17.80%
> 15 μg/kg/min	51	14.70%
Perioperative myocardial infarction	19	5.50%
ICU-recovery
≤ 48 hours	279	80.20%
> 48 hours	69	19.80%

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, ICU: Intensive Care Unit

ISSN: 1749-8090