Figure 4. Inefficient contact lesions with greater than 10% of the ablation time below the minimum acceptable CF (CF < 5g).A) Fewer inefficient contact lesions were found in the SureFlex group than Agilis. B) Difficult-to-access right-sided (i.e. RI and RS) pulmonary veins had the greatest difference in inefficient contact lesions between the SureFlex and Agilis groups. (*p < 0.001, **p = 0.009).