The Effect of Fluid Overload on Attributable Morbidity after Cardiac Surgery: A Retrospective Study

Table 2

Perioperative characteristics.

	Q1; n = 186	Q2; n = 188	Q3; n = 187	Q4; n = 187	value
Type of procedure (%)
CABG	71.0	53.7	63.1	34.2	<0.001^a,c,d,e,f
AVR	8.1	16.0	10.7	20.9
CABG + AVR	2.7	6.9	11.8	27.3
MVR	7.0	5.9	5.3	4.3
Other	11.3	17.6	9.1	13.4
Intraoperative characteristics
ACC (min)	59.0 [36–83]	53.5 [32–77]	55.0 [39–75]	70.0 [46–109]	<0.001^c,e,f
ECC (min)	85.0 [56–116]	82.0 [48–111]	81.0 [58–107]	105.0 [68–148]	<0.001^c,e,f
Postoperative LVEF (%)
Good	73.1	73.4	84.5	78.1	0.038^b,d
Moderate	21.0	18.1	13.9	16.6
Poor	5.9	8.5	1.6	5.3
Use of noradrenaline (%)	12.9	23.4	18.2	32.1	<0.001^a,c,f
Use of dobutamine (%)	10.8	14.9	11.2	18.7	0.095
Postoperative sCR (μmol/L)	88 [73–104]	86 [72–102]	86 [69–104]	93 [73–116]	0.045^e,f

Data are expressed as median [interquartile range] or as percentage. CABG, coronary artery bypass grafting; AVR, aortic valve repair; MVR, mitral valve repair; ACC, aortic cross clamp; ECC, extracorporal circulation; sCR, serum creatinine. Groups are significantly different when . ^a: significant difference between Q1 and Q2; ^b: significant difference between Q1 and Q3; ^c: significant difference between Q1 and Q4; ^d: significant difference between Q2 and Q3; ^e: significant difference between Q2 and Q4; ^f: significant difference between Q3 and Q4.