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Table 1 Preoperative parameters in groups

From: Coronary by-pass for bad ventricle; adoption of "hybrid-pump" bypass

Groups A B  
  Hybrid-pump (n:54) On-pump (n:55) p
Age (years) 64 ± 1.4 67 ± 2.1 0.327
Gender (% male) 70 76 0.124
Reoperations (%) 5.5 3.6 0.098
Diabetes (%) 40 43 0.364
Hypertension (%) 53 58 0.213
Preoperative EF (%) 24 ± 3.4 26 ± 3.6 0.432
Angina pect (%) 68 69 0.743
Heart failure(%) 70 65 0.182
Renal failure (%) 16 18 0.464
COPD (%) 31 29 0.376