Abstract Background Atrioventricular canal defect is a rare congenital disorder of the heart and describes the presence of an atrial septal defect. a variable presentation of ventricular septal alterations including ventricular septal defect malformations in the mitral and tricuspid valves. The defect has been described in human beings. dogs. https://unitedssports.shop/product-category/cyclist-accessories-triathlon-junior-triathlon/