A clinical case of successful palliative endovascular treatment of a patient with a single ventricle, mitral valve atresia, an intact atrial septum and persistent cardinal vein.

Thus, palliative endovascular intervention in critically ill neonates with univentricular hemodynamics and anomalous pulmonary venous return can be considered as a method of choice that can become a new safer strategy for managing infants in order to stabilize the condition before the main stage of surgical intervention comes.