If a person has undergone heart surgery for ASD which means Atrial Septal Defect and is now medically fit then they can apply for the IAS exam There is no restriction for such candidates if their physical and mental condition is stable and they can perform the duties required in civil services However selection to IAS also depends on passing the medical test conducted after clearing the main exam and interview If the person has any lasting disability due to the heart condition and it is certified by a government medical board then they may be considered under the benchmark disability category as per the Rights of Persons with Disabilities Act In such cases the candidate may come under reservation for persons with disabilities in the specific category mentioned by the medical authority It is always advised to check the official UPSC notification and consult with a government hospital for proper disability certification before applying