Eisenmenger syndrome

Eisenmenger syndrome, also known as Eisenmenger's complex, is a disease caused by untreated congenital heart disease, leading to pulmonary hypertension and a series of symptoms in the patient. The main manifestations include cyanosis of the lips, dark skin, and clubbing of the fingers. The more severe the congenital heart disease, the higher the incidence and earlier the onset of Eisenmenger syndrome.