„Pulmonary embolism is not a disease. It is a complication of DVT.“(Ken Moser MD) Pulmonary embolism is a part of a clinical entity, together with venous thrombosisand it is called venous thromboembolism,. Today it is considered more like a complication of deep vein thrombosis, than as an isolated disease, because 95% of the thrombus is from the deep veins of the lower limb. As the third most common cardiovascular disease,after myocardial infarction and the stroke, it can present itself in different ways, from the asympotmatic disease, to acute lethal disease and chronic disease of the lungs. Therefore, a timely and appropriate diagnostic procedure is warranted, especially in pulmonary embolism, where the symptoms are often nonspecific. Great efforts where invested to design a way of easier diagnosis with the clinical presentation and noninvasive diagnostics. In clinical practice, patients are unnecessarily referred to CT angiography which results in inneccesary radiation and complications. The most common symptom of pulmonary embolism is sudden onset dyspnea. Pulmonary embolism is treated with anticoagulants, thrombolytics or surgical embolectomy.