Invited commentary

Abstract

Nowadays in congenital cardiac surgery it is unusual to discover new pathologies. However, a sum of “minor” circumstances could create new entities that may need to be treated. In my opinion this is the case when a persistent left superior vena cava (LSVC) appears to be draining in a significantly dilated coronary sinus. This association has been proven to be partly responsible for significant left atrioventricular supravalvar obstruction. An excessive flow along the posterior inferior left atrial wall in itself may markedly enlarge even a “normal” LSVC with a normal coronary sinus up to a point of partial obstruction of left ventricular inflow.