Differential diagnosis Cardiovascular disease Congenital heart disease Eisenmenger syndrome Pulmonary arteriovenous fistulae Systemic arteriovenous fistulae Primary pulmonary hypertensionDifferential diagnosis ◼ Cardiovascular disease -Congenital heart disease -Eisenmenger syndrome -Pulmonary arteriovenous fistulae -Systemic arteriovenous fistulae -Primary pulmonary hypertension