Eisenmenger syndrome is a condition that affects blood flow from the heart to the lungs in some people who were born with structural problems of the heart. Eisenmenger syndrome is a condition that results from abnormal blood circulation caused by a defect in the heart. Most often, people with this condition are born with a hole between the two pumping chambers the left and right ventricles of the heart.
Eisenmenger syndrome usually develops before puberty but may develop in adolescence and early adulthood.Patients in underdeveloped countries are more likely to present late with uncorrected congenital cardiac lesions and a markedly elevated pulmonary vascular resistance (PVR). They are more likely to be inoperable secondary to Eisenmenger physiology.