In double inlet left ventricle only the left lower heart chamber (left ventricle) is developed, and both upper chambers carry blood into this ventricle. A small, poorly developed right ventricle may be present. Double inlet left ventricle is one of several heart defects known as single (or common) ventricle defects, as there is essentially only one pumping chamber in the heart.
Update Date 5/14/2014
Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.