right descending pulmonary artery

right descending pulmonary artery (RDPA),

artery that supplies the right middle and lower lobes and comprises most of the right hilar shadow on the frontal chest radiograph.

right de·scend·ing pul·mo·nar·y ar·te·ry

(RDPA) (rīt dĕ-send'ing pul'mŏ-nar-ē ahr'tĕr-ē)
Artery supplying the right, middle, and lower lobes; comprises most of the right hilar shadow on the frontal chest radiograph.