Anesthesia for venous surgery.
D000758:Anesthesia; D006221:Halothane / Q000627:therapeutic use; D006801:Humans; D011229:Preanesthetic Medication; D011433:Propranolol / Q000627:therapeutic use; D013923:Thromboembolism / Q000601:surgery; D014656:Vascular Surgical Procedures
D011433:Propranolol; D006221:Halothane