Clarification of the definition of hypoplastic left heart syndrome

There is still no consensus on the anatomical combinations that make up the so-called hypoplastic left heart syndrome. We argue that an intact ventricular septum should now be part of the definition. Addition of this feature is necessary if accurate predictions are to be made about the morphogenesis of the condition.

Automated summary

There is still no consensus on the anatomical combinations that make up the hypoplastic left heart syndrome, but it is argued that an intact ventricular septum should be included in the definition to allow for accurate predictions of the condition's morphogenesis.