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.
References in periodicals archive ?
The chest radiograph is usually normal but may show features such as plate atelectasis, wedge-shaped peripheral opacities (the classic Hampton's hump occurs over the diaphragm), focal oligaemia (Westermark's sign), or enlargement of the pulmonary vessels (Palla's sign is an enlarged right descending pulmonary artery).