Hemodynamics; Hemorrhage/chemically induced; Heparin, Low-Molecular-Weight; Pulmonary Embolism; Warfarin; Acute Disease; Adult; Ambulatory Care/methods; Ambulatory Care/statistics & numerical data; Anticoagulants/administration & dosage; Anticoagulants/adverse effects; Drug Monitoring; Female; Heparin, Low-Molecular-Weight/administration & dosage; Heparin, Low-Molecular-Weight/adverse effects; Home Care Services/statistics & numerical data; Humans; International Normalized Ratio; Male; Middle Aged; Outcome Assessment, Health Care; Pulmonary Embolism/diagnosis; Pulmonary Embolism/drug therapy; Pulmonary Embolism/mortality; Pulmonary Embolism/physiopathology; Retrospective Studies; Severity of Illness Index; Sweden/epidemiology; Tomography, Emission-Computed, Single-Photon/methods; Ventilation-Perfusion Ratio; Warfarin/administration & dosage; Warfarin/adverse effects