| 
      
        | Author | Patient population | Radial artery loop | Tortusous radial artery
          n (%) | High radial take-off | Radial or ulnar stenosis |  
        | Toshiharu Fujii [8] | 163 | 2 (1.2) | 25 (15.3) | 8 (4.9) | 4 (2.5) |  
        | Lo    TS [9] | 1540 | 35 (2.3) | 30 (2) | 35 (2.3) | 39 (2.5) |  
        | Nie Bin [10] | 3000 | 33 (1.1) | 150 (5) | 231 (7.7) | 43 (1.4) |  
        | Yoo BS [11] | 1191 | 16 (1.3) | 67 (4.2) | 38 (3.2) | no data |  
        | N. Yokoyama [12] | 115 | 1 (0.9) | 6 (5.2) | 0 | 2 (1.7) |  |