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Table 1 Baseline characteristics

From: Impaired right ventricular ejection fraction after cardiac surgery is associated with a complicated ICU stay

  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*
  1. *Indicates a significant difference across groups
  2. 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