Short, both groups are treated according to a recent Fast track protocol. Group A will preoperatively receive a mid thoracic EDA (th 8-9; naropine 0,1%) while group B will receive a PCA (morphine) postoperatively. Both EDA and PCA are removed the afternoon at day 2. Patients with a non-functioning EDA within the first 24h will be crossed over to the PCA group.