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The failure of the circulatory system of the newborn to adapt to these changes by lowering PVR leads to persistent fetal circulation. [2] The newborn is therefore born with elevated PVR, which leads to pulmonary hypertension. Because of this, the condition is also widely known as persistent pulmonary hypertension of the newborn (PPHN). [3]
Persistent pulmonary hypertension of the newborn occurs when the circulatory system of a newborn baby fails to adapt to life outside the womb; it is characterized by high resistance to blood flow through the lungs, right-to-left cardiac shunting and severe hypoxemia. [15]
Retrieved from "https://en.wikipedia.org/w/index.php?title=Persistent_pulmonary_hypertension_of_the_newborn&oldid=217472835"
Persistent pulmonary hypertension (PPHN) is the failure of the foetal circulation to adapt to extra-uterine conditions after birth. PPHN is associated with various respiratory diseases, including MAS (as 15-20% of infants with MAS develop PPHN), but also pneumonia and sepsis.
If an echocardiogram is performed, marked thickening of the right ventricle will be seen, resulting from highly elevated pulmonary blood pressure. ACD is generally resistant to treatment. Babies who have persistent symptoms that are poorly relieved by standard therapies for neonatal pulmonary hypertension is commonly observed in ACD. [1]
Two conditions, pulmonary veno-occlusive disease and pulmonary capillary hemangiomatosis comprise this category. The subcategory is characterized by severe hypoxemia, capillary congestion and prominent post-capillary venule thickening. [2] Group 1.7 PAH, with an estimated 0.18% prevalence, is persistent pulmonary hypertension of the newborn.
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