There are many different heart problems in which the baby only has one functioning ventricle (pumping chamber). Hypoplastic left heart syndrome is the most common of these single ventricle problems.
![Complex Single Ventricle Disease (Double Inlet Left Ventricle with Ventricular Inversion)](../images/heart-atlas/double-inlet-left-ventricle-ventricular-inversion-560.jpg)
Complex Single Ventricle Disease
(Double Inlet Left Ventricle with Ventricular Inversion)