<human>: Can you provide a brief overview of the text?

Last year, my school offered free EKG tests for students. I took it on impulse to get out of my gym class for a day, and the test found that I have an Atrial Septal Defect (details [here] ). Basically, the defect is a whole in the septum dividing the left and right atria in the heart. Upon further investigation by two cardiologists, they agree that I need full-blown open heart surgery to patch the hole with a piece of my pericardium (outer cover of the heart). Upon further research of the procedure itself and the subsequent recovery, I am getting really nervous. I scheduled it so I will not miss too many school days, choir concerts, or other events. However, I will most likely miss my senior prom and even possibly take my AP exams on a makeup date. Any words from cardiologist redditors, people with similar surgeries or defects, or anyone for that matter regarding the procedure, recovery, or simply wrapping ones mind around the prospect of having one's first major surgery would be greatly appreciated.
<bot>: I have a heart deformity and need open heart surgery to repair it. Does anybody here know about the process or any tricks to feeling less nervous and having a positive recovery?