| Variable | 
        Group N          (n=18) | 
        Group H (n=3) | 
        P value | 
       
      
        | Preoperative data  | 
          | 
          | 
          | 
       
      
        | Number of patients with  | 
          | 
          | 
          | 
       
      
        | preoperative cardiac comorbidities  | 
        5 (%)  | 
        3 (100%)  | 
        0.017  | 
       
      
        | NYHA classification 
          I, II (cases)  | 
        18  | 
        3  | 
          | 
       
      
        | III, IV (cases)  | 
        0  | 
        0  | 
        1.0  | 
       
      
        | Hugh-Jones classification 
          I, II (cases)  | 
        18  | 
        3  | 
          | 
       
      
        | Ⅲ,Ⅳ(cases)  | 
        0  | 
        0  | 
        1.0  | 
       
      
        | Respiratory function 
          FEV1..0, %  | 
        76.5 ± 13.3  | 
        82.0 ± 11.4  | 
        0.509  | 
       
      
        | %VC, %  | 
        88.7 ± 13.0  | 
        73.3 ± 5.15  | 
        p<0.05  | 
       
      
        | Laboratory Findings 
          Hematocrit (%)  | 
        31.9 ± 5.24  | 
        30.4 ± 1.42  | 
        0.340  | 
       
      
        | Total Protein (g/dl)  | 
        6.81 ± 0.55  | 
        6.57 ± 0.06  | 
        0.091  | 
       
      
        | Intraoperative data  | 
          | 
          | 
          | 
       
      
        | Operation time, min  | 
        186 ± 41.7  | 
        238 ± 119  | 
        0.532  | 
       
      
        | Anesthesia time, min  | 
        238 ± 43.4  | 
        283 ± 113  | 
        0.558  | 
       
      
        | Infusion, ml/kg/hr  | 
        2.81 ± 1.81  | 
        5.57 ± 0.398  | 
        p<0.05  | 
       
      
        | Blood loss, ml/kg/hr  | 
        1.11 ± 0.696  | 
        1.49 ± 0.354  | 
        0.378  | 
       
      
        | Cases of blood 
          transfusion, cases  | 
        2 (11.1%)  | 
        1 (33.3%)  | 
        0.899  | 
       
      |