A patient with a ventricular septal defect, an atrial septal defect, and a cleft mitral...

Comprehensive and Detailed Explanation From Exact Extract:

Atrioventricular canal defect (AV canal defect) is a congenital cardiac malformation characterized by defects in the atrial and ventricular septa, along with abnormalities of the atrioventricular valves including cleft mitral valve. These features collectively cause shunting and valve regurgitation.

Ebstein anomaly primarily involves the tricuspid valve and right atrium, Marfan syndrome is a connective tissue disorder with different manifestations, and Shone syndrome involves left-sided obstructive lesions.

This is clearly outlined in the "Textbook of Clinical Echocardiography, 6e", Chapter on Congenital Heart Defects - Atrioventricular Septal Defects【20:120-125†Textbook of Clinical Echocardiography】.