*5.5.1 Double chambered right ventricle*

First described in 1858 by TB Peacock, double chambered right ventricle may evolve as a complication in some patients with VSD. It is characterized by a midcavitary obstruction either due to hypertrophy of the crista supraventricularis or of septoparietal trabeculations causing the right ventricle to divide into a high-pressure proximal portion and a low-pressure distal portion. It can occur in up to 8–10% of patients with VSDs [20].
