Non-invasive Diagnosis of Pulmonary Embolism by Use of Biomarkers in Exhaled Breath Condensate

Inclusion Criteria - Suspected/confirmed PE patients: * Admitted to the emergency department with initial diagnosis of PE, visited to the Department of Cardiology at Aalborg University Hospital. * Are conscious and able to understand the given study information. * Possess legal capacity. * Age above 18 years. * Informed, signed consent is obtained. * Clinically stable, which is defined as patients with stable blood pressure and not in need for other treatments . * No need for organ support, which comprises need for vasopressors or inotropes, mechanical ventilation, extra corporal circulation or renal replacement therapy. Inclusion Criteria - Controls: • Patients as the PE patients, but where the diagnosis of PE is rejected. The rest of the control persons will be recruited as described: * Patients who are going to have elective procedures at the Department of Cardiology, Aalborg University Hospital. * Same gender and age (within a 10-year range) as an included PE patient. * Are conscious and able to understand the given study information. * Possess legal capacity. * Age above 18 years. * Informed, signed consent is obtained. Exclusion Criteria: * Active malignant disease (i.e. ongoing anti-cancer therapy or palliation). * Current smokers