Increased pulmonary blood flow radiologically indicated by all except:

(Refer – M.Satpathy’s Clinical Diagnosis of Congenital Heart Disease, 1st edition, pg no: 38) Features of increased pulmonary blood flow Blood vessels become visible in the outer third of lung field (At least 6 vessels can be traced to theouter third). When hilar and intrapulmonary vessels are uniformly changed, it is very suggestive of shunt lesions. Ratio of right descending pulmonary artery to trachea > 1 Right descending pulmonary artery diameter> 14 mm suggests increased blood flow and >17 mm is very strongly suggestive Prominent end-on vessels seen at hilum Enface vessels below 10th posterior rib Prominent vessels seen below crest of diaphragm Ratio of vessels to adjacent bronchus >2:1