In recent years new imaging techniques have been developed for the diagnosis of acute pulmonary embolism (PE). During 3-months of follow-up, 9 patients (9.7%) were readmitted to hospital, of whom 4 patients were readmitted due to pain or dyspnea related to the PE and 5 patients because of major bleeding. In a study of 647 PE patients, 3.4% of patients with residual PVO after 6 months of the initial PE diagnosis were diagnosed with CTEPH versus none of the patients without residual PVO [[6]]. [Extracted from the article]