<prompt> All the following are radiological features of Chronic Cor pulmonale except :Kerley B linesProminent lower lobe vesselsPleural effusionCardiomegaly  <response>: Answer is B Prominent lower lobe vessels Congestive cardiac failure or corptilmonale are associated with prominence of upper lobe vessels and not lower lobe vessel Features of Congestive Cardiac FailureCCF CHF include : Enlarged cardiac silhouette Cardiac shadow on chest X-ray e Ground glass appearance of pulmonary edema Q Kerley B lines 2 Prominence of upper lobe blood vessels Q not lower lobe veins Pleural effusion, usually bilateral Kerley B lines, also known as Septal lines, represent dilated lymphatics and distended interlobular septa. They occur most commonly in pulmonary edema as a result of chronic pulmonary venous hypeension in CCF. Kerley A lines stand for Apex, 73 for Base, and C for Central region. B lines are most commonly seen Q.Infact they have a relation with left atrial pressure Q :They are invariably present if LA pressure goes above 20 mmHg.deg 