<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 : Chronic Cor Palmonale is associated with prominence of upper lobe and not lower lobe veins. Features of Congestive Cardiac FailureCCF CHF include : 1. Enlarged cardiac silhouette Cardiac shadow on chest X-rayQ 2. Ground glass appearance of pulmonary edema Q 3. Kerley B linesQ 4. Prominence of upper lobe blood vessels Q not lower lobe veins 5. Pleural effusion, usually bilateral Q Kerley B lines, also known as Septa 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, B 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. Q Small bilateral pleural effusions are frequently seen in acute LVF. Large effusion may be present in long standing cases of congestive hea failure. 