To be aware of Pulmonary Hypertension and its clinical importance To discuss the role of radiologists; Recognizing Computed Tomography (CT) findings of pulmonary hypertension Distinguishing different causes of pulmonary hypertension with CT

Pulmonary Hypertension is a clinical entity with high mortality and morbidity. Number of researches in this field increased over the last years. During the 5th World Symposium held in Nice, France, in 2013, modifications and updates inclinical classification were proposed. Pulmonary Hypertension is a consequence of vascular changes within the arterial or venous pulmonary circulation with a mean pulmonary artery pressure greater than 25 mm Hg at rest or greater than 30 mm Hg during exercise. Presenting symptoms of pulmonary hypertension such as exertional dyspnea...

Pulmonary Hypertension is a consequence of vascular changes within the arterial or venous pulmonary circulation. These changes may be idiopathic or secondary to alterations in pulmonary blood flow. Thorax CT and pulmonary CT angiography are helpful for detecting idiopathic pulmonary hypertension and distinguishing various different causes of secondary pulmonary hypertension. The classic CT findings of arterial pulmonary hypertension: Pulmonary trunk enlargement (≥ 29 mm, ≥ aortic diameter)(Fig.1) Sharply pruned peripheral vasculature Small tortuous peripheral arteries A segmental artery–to-bronchial diameter ratio of 1:1 or more in...

Clinical symptoms of pulmonary hypertension are nonspesific and can lead to delay in the diagnosis. Measurement of the diameter of pulmonary truncus and awareness of other pulmonary hypertension signs should be a part of chest CT assesment, especially in patients with lung-/liver disease and malignancies. If pulmonary hypertension is detected, list the possible underlying diseases and check their imaging findings like thrombi, mosaic attenuation, interstitial fibrosis etc. Chronic pulmonary thromboembolism, a curable disease, should always be kept in mind in the differential diagnosis of pulmonary...

Castañer E, Gallardo X, Ballesteros E et al. CT Diagnosis of Chronic Pulmonary Thromboembolism. RadioGraphics 2009;29:31–53. Devaraj A, Wells AU, Meister MG, Loebinger MR, Wilson R, Hansell DM. Pulmonary hypertension in patients with bronchiectasis: prognostic significance of CT signs. Am J of Roentgenol 2011; 196:1300-1304. Frazier AA, Galvin JR, Franks TJ,Rosado-de-Christenson ML.Pulmonary Vasculature: Hypertension and Infarction. RadioGraphics2000;20:491-524. Grosse C, GrosseA.CT Findings in Diseases Associated with Pulmo­nary Hypertension: A Current Review. RadioGraphics 2010;30:1753–1777. Peacock A. Pulmonary hypertension. Eur Respir Rev 2013;22:127, 20–25.