echocardiography: congenital defect shunt flow left ventricle to right atrium left to right
echocardiography: congenital defect shunt flow left ventricle to right atrium left to right
echocardiography: congenital defect shunt flow left ventricle to right atrium left to right (procedure)
echocardiography: congenital defect shunt flow left ventricle to right atrium left to right (procedure)