Table 1.

Perioperative characteristics of low-risk and high-risk patients

	Low risk patients	High risk patients	P
Age (years)	55±11.12	61.91±12.22	NS
Sex, female (n/%)	1/12.5	3/27.3	NS
Logistic EUROSCORE (%)	1.79±0.51	8.37±3.12	<0.0001
Preoperative ejection fraction (%)	56.88±3.84	49±14.6	NS
Preoperative MAP (mmHg)	94.38±10.84	105.00±13.78	NS
Diabetes mellitus (n/%)	0/0	0/0	NS
Atrial fibrillation (n/%)	0/0	5/45.5	0.045
Coronary artery disease (n/%)	0/0	1/9	NS
Previous ischemic stroke (n/%)	0/0	1/9	NS
Chronic obstructive pulmonary disease (n/%)	0/0	3/27.3	NS
Cardio-pulmonary bypass time (min)	73.25±8.56	107.09±52.09	0.09
Aortic cross-clamp time (min)	57.13±11.28	72.64±46.51	NS
Preoperative serum creatinine, (mg/dL)	0.82±0.11	1.02±0.32	NS
24 h postoperative serum creatinine, (mg/dL)	0.79±0.11	1.3±0.52	NS
Preoperative hematocrit (%)	40.14±3.96	38.95±4.63	NS
24 h postoperative hematocrit (%)	38.19±2.99	35.46±4.51	NS
Preoperative plasmatic sodium (mmol/L)	139.37±1.99	139.58±2.21	NS
24 h postoperative plasmatic sodium (mmol/L)	139.56±2.10	142.48±3.01	NS

MAP: Mean arterial pressure, NS: Not significant, EUROSCORE: European system for cardiac operative risk evaluation