Keshan Disease is a type of heart disease that primarily affects people in certain regions of China, particularly in areas with low levels of selenium, an essential mineral. It is characterized by symptoms such as heart enlargement, heart failure, and arrhythmias. The disease is most commonly seen in children and women of childbearing age. The condition is linked to a deficiency in selenium, which plays a crucial role in maintaining heart health. Supplementing with selenium has been shown to reduce the incidence of Keshan Disease in affected populations. Early diagnosis and treatment are important for improving outcomes.