Learn more about atrial septal defect- its causes, symptoms and understand how it is diagnosed and treated at the best Cardiology Hospital in Hyderabad. https://www.kimssunshine.co.in/blog/cardiology/atrial-septal-defect-asd-the-silent-heart-hole-that-often-goes-unnoticedan-atrial-septal-defect-asd-is-a-common-condition-that-affects-millions-of-people-worldwide-studies-show-that-asd-accounts/