Atrial Septal Defect (ASD) is a congenital heart condition characterized by an abnormal opening between the upper two chambers of the heart, the atria. This opening, known as the septum, fails to close properly during fetal development, leading to a passage between the left and right atria. ASD can vary in size, and its impact on heart function depends on the size and location of the defect. In many cases, small ASDs may not cause noticeable symptoms and can go undetected for years. However, larger defects can potentially lead to complications, including an increased risk of developing heart-related issues such as arrhythmias, pulmonary hypertension, or stroke. Diagnosis often involves a combination of physical examinations, imaging tests, and echocardiograms. Treatment options range from monitoring for small, asymptomatic defects to more proactive interventions, such as surgical repair or catheter-based procedures, for larger or symptomatic cases. Advances in medical technology and treatment options have significantly improved the outlook for individuals with ASD, allowing for timely and effective management of this congenital heart condition. Regular follow-up care is essential to monitor heart health and address any potential complications, ensuring individuals with ASD can lead healthy and fulfilling lives