Persistent Pulmonary Hypertension (PPHN) Quiz

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What is the result of excessively high PVR in persistent pulmonary hypertension (PPHN)?

Persistence of the fetal circulatory pattern of right-to-left shunting through the PDA and foramen ovale after birth

What is the consequence of lung inflation in reducing PVR?

Rapid decline in PVR

What suggests right-to-left shunting through the ductus arteriosus in PPHN?

PaO2 or oxygen saturation gradient between a preductal and a post-ductal site of blood sampling

What is the pathogenesis of PPHN related to chronic fetal hypoxia?

Increased pulmonary artery medial muscle thickness and extension of smooth muscle layers into the usually non-muscular, more peripheral pulmonary arterioles

What diagnostic tool is helpful in evaluating PPHN?

2D echo with Doppler

Test your knowledge of Persistent Pulmonary Hypertension (PPHN) with this quiz. Explore the pathogenesis, right-to-left shunting through PDA and foramen ovale, and factors influencing pulmonary vascular resistance.

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