Persistent Pulmonary Hypertension



Persistent Pulmonary Hypertension


Larissa V. Furtado, MD









Gas exchange is primarily performed by the placenta in utero. Lungs are bypassed due to high pulmonary vascular resistance. Oxygenated blood from the placenta image reaches the heart via the ductus venosus & inferior vena cava image & enters the left atrium through the foramen ovale image. Blood flows to the aorta from the left ventricle or via ductus arteriosus image, & only 5-10% of cardiac output reaches the lungs. At birth, systemic vascular resistance increases, lung vascular tone decreases, & pulmonary perfusion starts. Failure of the pulmonary circulation to make this transition at birth results in persistent pulmonary hypertension.

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Jul 8, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Persistent Pulmonary Hypertension
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