Table 1.

Baseline characteristics

	RVEF < 20% N = 216	RVEF 20–30% N = 747	RVEF > 30% N = 146	p value
Demographics
Age (years)	74 [67–79]	70 [63–77]	66 [58–73]	< 0.001*
Male sex (%)	65	64	69	0.635
Body weight (kg)	76 [68–86]	80 [71–90]	83 [72–93]	0.002*
Comorbidities (%)
Diabetes mellitus	18	21	16	0.367
Peripheral vessel disease	15	15	17	0.565
TIA/CVA	16	121	12	0.269
Neurological dysfunction	4	4	5	0.772
COPD	22	17	12	0.038*
Cardiac status (%)
Recent myocardial infarction (< 90 days)	12	12	9	0.602
Previous cardiac surgery	19	22	20	0.618
Unstable angina	4	5	1	0.036*
Preoperative LVEF (%) (TTE)
- Good (> 55%)	40	59	66
- Moderate (30–49%)	33	26	24	< 0.001*
- Poor (< 30%)	27	15	10
Preoperative status
Preoperative serum creatinine (μmol/l)	88 [76–107]	88 [75–102]	89 [77–100]	0.638
Preoperative pulmonary hypertension (%)	7	3	1	0.013*
Intraoperative characteristics
Aortic cross-clamp (min)	98 [71–129]	97 [68–140]	93 [64–133]	0.578
ECC (min)	139 [96–187]	137 [99–190]	126 [89–182]	0.363
Procedure (%)
CABG	13	12	11	0.285
Valve	49	45	54
CABG + valve	28	32	23
Other	10	10	12
Risk scores
APACHE IV	52 [43–62]	50 [40–59]	46 [36–54]	< 0.001*
EuroSCORE I	8 [6–10]	7 [5–9]	6 [4–8]	< 0.001*

*Indicates a significant difference across groups

Abbreviations: APACHE, Acute Physiology and Chronic Health Evaluation; CABG, coronary artery bypass grafting; COPD, chronic obstructive pulmonary disease; CVA, cerebral vascular accident; ECC, extracorporeal circulation; EuroSCORE, European System for Cardiac Operative Risk Evaluation; LVEF, left ventricular ejection fraction; RVEF, right ventricular ejection fraction; TIA, transient ischemic attack; TTE, transthoracic echocardiography