Reticulovascular radiologic pattern in primary arterial pulmonary hypertension
We tested the value of the radiographic indexes in 16 patients with the diagnosis of pulmonary hypertension of unknown etiology. The index PL/T (lung-lobe-thoracic) was abnormal in 62.5%, the Osawa-Kanemoto index (DPA(T/2] was also abnormal in 62.5% of the cases, the r/h index (which measures the ratio right pulmonary artery thickness/right lung field) was abnormal in 81% of the cases. There was no relationship between the above mention indexes and the pulmonary artery pressure. Seven of the 16 patients displayed a new radiographic image that we have named "reticulo-vascular pattern", this radiographic sign may be important in the diagnosis of primary pulmonary hypertension.