Transposition of the Great Arteries, L-TypeNancy McDaniel M.D.The heart in this defect has four chambers and four valves. When the heart formed in this defect, the pumping chambers formed on the wrong side. This is called ventricular inversion. However, the blue blood goes from the body out to the lungs correctly. The red blood comes back from the lungs and goes to the aorta and body correctly. This defect alone may cause no difficulties. Ventricular inversion sometimes also includes holes in the heart such as a ventricular septal defect, and the lung artery may be narrowed. Sometimes people with this disease have a defective natural pacemaker and may need to have an artificial pacemaker put in. This defect is very complex and very rare. Often surgery can be done to improve symptoms.
 Normal Heart  |