Differential Diagnosis Pathology murmurs due to an abnormality of primary cardiac origin) Ventricular septal defect Atrial septal defect Patent ductus arteriosus Tetralogy of fallotDifferential Diagnosis ◼ Pathology murmurs (due to an abnormality of primary cardiac origin) Ventricular septal defect Atrial septal defect Patent ductus arteriosus Tetralogy of fallot