511. Effects of Thoracic Epidural Anaesthesia on Intraoperative Haemodynamics and Postoperative Analgesia for Thoracic Surgery: Levobupivacaine Versus Bupivacaine
511. Effects of Thoracic Epidural Anaesthesia on Intraoperative Haemodynamics and Postoperative Analgesia for Thoracic Surgery: Levobupivacaine Versus Bupivacaine