Eisenmenger complex is a chronic complication of irreparable heart disease (congenital) that somebody was born with.
The congenital heart defects (CHDs) related to the Eisenmenger complex can result in blood abnormally circulating in your lungs and heart. When the blood does not circulate in a normal way, the blood veins in the lungs will become narrow and rigid, raising the pressure in the arteries of your lungs.
This constantly harms the blood vessels in the lungs. With early diagnosis and intervention of congenital heart defects, this fatal condition can often be evaded. If the Eisenmenger complex does arise, it needs mindful and cautious medical observation.