highly significantP <0.001
ater block of the somatic nerves together with block of the sympathetic chain and the rami communicans when local anesthetic is placed alongside the vertebral column rather than anatomically distant from it in the paravertebral space.[ 15 ] The mean arterial blood pressure in our study demonstrated highly significant decrease in EP group than PVB group ( P <0.001), which was in accordance with previous study that used local anesthetic through thoracic epidural analgesia during major abdominal surgery proved that significant hypotension has been occurred in all groups after application of epidural solution.[ 16 ] One of the most complicated issues needed to be addressed are how to distinguish between adequate anesthesia and effective analgesia and how to quantify intraoperative analgesia.