In a normal heart, oxygen-depleted ("deoxygenated") blood is pumped from the right atrium into the right ventricle, then through the pulmonary artery to the lungs where it is oxygenated. The oxygen-rich ("oxygenated") blood then returns, via the pulmonary veins, to the left atrium from which it is pumped into the left ventricle, then through the aorta to the rest of the body, including the heart muscle itself. With l-TGA, deoxygenated blood is pumped from the right atrium into the morphological left ventricle (which lies on the right side of the heart), then through the pulmonary artery to the lungs. The oxygenated blood then returns, via the pulmonary veins, to the left atrium from which it is pumped into the morphological right ventricle, then through the aorta. Variations and similar defects l-TGA is often accompanied by other heart defects, the most common type being intracardiac shunts such as atrial septal defect (ASD) including patent foramen ovale (PFO), ventricular septal defect (VSD), and patent ductus arteriosus (PDA). Stenosis of valves or vessels may also be present. When no other heart defects are present it is called 'simple' l-TGA; when other defects are present it is called 'complex' l-TGA.
Levo-Transposition of the great arteries
Double aortic arch
Dextro-Transposition of the great arteries
Transposition of the great vessels
Tetralogy of Fallot
Trilogy of Fallot
Double outlet right ventricle
Persistent truncus arteriosus