Atrioventricular canal defect (also called endocardial cushion defect or atrioventricular septal defect) is a large hole in the septum, accompanied by abnormal tricuspid and mitral valves that are not formed as individual valves.
Between 75 and 85% of children with Marfan have loose or "floppy" mitral valves, which are the valves that separate the chambers of the heart.
When these valves do not cover the opening between the chambers completely, the condition is called mitral valve prolapse.
Some children develop a curvature in the spine, flat feet, and a heart condition known as mitral valve prolapse.
About 50 percent of affected individuals develop mitral valve prolapse, a heart condition, as adults.
In children with Marfan, it is the abnormal mitral valve that is most likely to become infected.
Mitral valve prolapse may be detected as a heart murmur but there are usually no symptoms.
Complications of mitral valve prolapse include heart murmurs and arrhythmias.
Mitral valve prolapse-A heart defect in which the mitral valve of the heart (which normally controls blood flow from the left atrium to the left ventricle) becomes floppy.
Two or three membranous flaps, held by numerous chordae tendineae, form a true mitral valve, and allow the blood to pass through the left ostium atrioventriculare.