Right pulmonary artery

Medically reviewed by Healthline Medical Team on March 20, 2015Published on March 20, 2015

The pulmonary artery begins at the base of the heart's right ventricle. It is approximately 3 cm in diameter and 5 cm in length and it eventually divides into the left pulmonary artery and the right pulmonary artery. These arteries then deliver oxygen-depleted blood to each corresponding lung. This is one of the rare arteries that carry deoxygenated blood; the other location is found within the fetus, where the umbilical arteries are. A variety of lung diseases can cause pulmonary hypertension, which is when the blood pressure increases in the pulmonary artery. Pulmonary hypertension can be a consequence or a cause; for example, it may be a consequence of heart disease or a cause of right-ventricular heart failure. Other conditions that may cause pulmonary hypertension include scleroderma and pulmonary embolism. Scleroderma is a chronic systemic autoimmune condition that causes hardening of the skin and connective tissues. A pulmonary embolism occurs when a substance from another place in the body blocks the left or right pulmonary artery.

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