Prophylaxis of postoperative deep venous thrombosis.
D004087:Dihydroergotamine / Q000627:therapeutic use*; D004338:Drug Combinations; D006493:Heparin / Q000627:therapeutic use*; D006801:Humans; D011183:Postoperative Complications / Q000517:prevention & control*; D011877:Radionuclide Imaging; D013924:Thrombophlebitis / Q000000981:diagnostic imaging / Q000517:prevention & control*
D004338:Drug Combinations; D004087:Dihydroergotamine; D006493:Heparin