Figure 2. Comparison of contact force in left vs. right pulmonary veins. A) Higher mean contact force per lesion was achieved among right-sided pulmonary veins (i.e. right inferior and superior) than left-sided veins (i.e. left inferior and superior). B) A higher level of CF variability was observed among individual lesions in right-sided veins than left sided veins. (*p = 0.001).