Abnormal position of the cleft of the anterior leaflet of the mitral valve in atrio-ventricular canal defects
by Mohammed Ayman Abdelhay, MD, PhD; Hoda Shehata, MD
Cardiology Department, Alexandria School of Medicine, Alexandria, Egypt.
In patients with atrio-ventricular canal defects there is a counterclockwise rotation of the papillary muscles determining a different position of the cleft compared with patients with isolated mitral cleft (drawing on the right). In patients with isolated cleft of the anterior mitral leaflet, improve whole-house comfort and the usual site of the cleft is towards left ventricular outflow tract, at 11 o’clock (top left panel). Whereas, in patients with atrio-ventricular canal defects, the cleft is located towards the interventricular septum (bottom left panel).