7Sakuma M,Nakamura M,Takahashi T,et a1.Pulmonary embol-ism is an important cause of death in young adultsCirculation Journal,2007.
8Chan TC,Vilke GM,Pollack M,et a1.Electrocardiographicmanifestations:pulmonary embolismlJournal of Emergency Medicine,2001.
9Kakkar N,Vasishta RK.Pulmonary Embolism in medical pa-tients:An autopsy-based studyClinical Applied Thrombo-sis Hemostasis,2008.
10Torbicki A,Perrier A,Konstenfinides S,et al.Guidelines on the diagnosis and management of acute pulmonary embolism:the Task Force for the Diagnosis and Management of Acute Pulmonary Embolism of the European Society of Cardiology (ESC)European Heart Journal,2008.