3.4 Characteristics of the CB procedure in the CST success group
The characteristics of parameters during CB applications to the superior and inferior PVs in 16 cases in the CST success group are summarized in Table 2. Complete occlusion of the superior PVs with the CB was achieved in 15/16 cases (93.8%) and the minimum NT for CB application to the superior PVs ranged from -46°C to -60°C. In all 16 cases except case 9, the first CB application to the inferior PVs succeeded in isolating the superior PVs and no further applications were added. In case 9, because the esophageal temperature during the first CB application to the inferior PVs decreased below 15°C, the application was ceased and superior PV isolation was achieved by the next application that was added after the esophageal temperature recovered to above 30°C.