Summary: This week we speak with Professor Marc Gewillig of University Hospitals, Leuven, Belgium about a recent work he co-authored on the physiology of the Fontan. What is the most important feature of a Fontan circulation in the initial versus late stages after palliation? What constitutes a 'good Fontan'? What is meant by likening the Fontan to a "dam"? Dr. Gewillig provides us with a number of practical concepts in thinking about our Fontan patients and how we might conceptualize possible therapies to improve Fontan flow. doi: 10.1111/apa.15098
