Fetal and Post Transition Circulation

In the fetal ...
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Fetal and Post Transition Circulation



In the fetal circulatory system, oxygenated blood is delivered via the umbilical vein, entering the inferior vena cava via the ductus venosus. The majority of this oxygenated blood passes through the right atrium and into the left atrium through the foramen ovale to enter the systemic circulation.



Meanwhile, high pulmonary pulmonary vascular resistance (due to hypoxic vasoconstriction in fluid-filled alveoli) means that most of the deoxygenated right ventricular output is routed through the ductus arteriosus and enters into the systemic circulation – mixing with oxygenated blood distal to the highest priority end-organs (brain and heart), to be reoxygenated at the placenta.



#Fetal #Circulation #Pathophysiology #Cardiology #Anatomy #Peds #Pediatrics 
Contributed by

Dr. Gerald Diaz
@GeraldMD
Board Certified Internal Medicine Hospitalist, GrepMed Editor in Chief 🇵🇭 🇺🇸 - Sign up for an account to like, bookmark and upload images to contribute to our community platform. Follow us on IG:  https://www.instagram.com/grepmed/ | Twitter: https://twitter.com/grepmeded/
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