Patients will be randomised into two groups as Group E (those who received general anesthesia after the erector spina plan block) and Group T (those who received general anesthesia after thoracic epidural block).
After the block skin conductivity (galvanic skin response - GSR), body temperature changes, sympathetic and sensory block levels, peri-operative hemodynamic data, postoperative pain scores and analgesic consumption will be recorded.
