No differences existed between the two groups in terms of clinical background and various parameters related to the catheter ablation , including RF delivery time and number of RF deliveries at an esophageal temperature of > @ C. Esophageal lesions , such as esophagitis and esophageal ulcers , occurred in @/@ ( @ % ) and @/@ ( @ % ) patients in the multi-thermocouple and deflectable temperature probe groups , respectively ( P = @ ) .