Pulmonary thromboembolism; prevention of fatal postoperative.
D000368:Aged; D001780:Blood Coagulation Tests; D005260:Female; D006493:Heparin / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000517:prevention & control*; D011655:Pulmonary Embolism / Q000517:prevention & control*
D006493:Heparin