In this episode, we review the epidemiology of congenital heart diseases and develop a framework for categorizing them by cyanotic and non-cyanotic disorders, and go over physiologic concepts across congenital conditions. What are the 5 'T' disorders that are characterized by cyanosis? What are the non-T disorders that can develop cyanosis? What is the tipping point for Eisenmenger syndrome to occur? What are the non-cardiac manifestations of Eisenmenger syndrome? Is phlebotomy appropriate in Eisenmenger syndrome? What is the role of bosentan and sildenafil/tadalafil in Eisenmenger syndrome? What Qp/Qs ratio indicates a large left-to-right shunt that requires repair? What Qp/Qs ratio indicates a a small left-to-right shunt? What Qp/Qs ratio indicates net right-to-left shunting? What is the Flamm formula for calculating mixed venous saturation proximal to a transatrial shunt? What should you suspect if pulmonary oxygen saturation exceeds 80%, or is 8% higher than the superior vena cava's oxygen saturation? What is the difference between physiologic shunting and anatomic shunting? What conditions comprise ACHD physiologic stages A, B, C, and D? Tune in for answers to these questions.

Difficulty Level: Intermediate

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