Eisenmenger Syndrome is a rare condition characterized by the reversal of a congenital heart defect, leading to abnormal blood flow between the heart's chambers. It primarily affects individuals with certain heart defects, such as ventricular septal defect or atrial septal defect. The prevalence of Eisenmenger Syndrome is estimated to be around 1 in 2,000 to 1 in 7,000 individuals worldwide. Although it is considered a rare condition, it can have significant health implications and requires careful management. Early diagnosis and appropriate medical care are crucial for individuals with Eisenmenger Syndrome.