Conversation so far:
Where was Kurt Göde born?
Kurt Gödel was born in Brünn, Austria-Hungary.
When was Kurt Göde born?
Kurt Gödel was born April 28, 1906, in Brünn, Austria-Hungary.
What was Kurt Göde home life like?
Kurt Gödel would remain close to his mother; their correspondence was wide-ranging. At the time of his birth the city had a German-speaking majority which included his parents.
Where did Kurt Gödel go to school?
Kurt Gödel attended the Evangelische Volksschule, a Lutheran school in Brünn from 1912 to 1916, and was enrolled in the Deutsches Staats-Realgymnasium from 1916 to 1924.
What were Kurt Gödel's interests?
Although Kurt Gödel had first excelled in languages, he later became more interested in history and mathematics.
Are there any other interesting aspects about Kurt Gödel's childhood?
In his family, young Kurt Gödel was known as Herr Warum (Mr. Why) because of his insatiable curiosity.

Question: What made him think his heart had permanent damage?
Self-contained rewrite: What made Kurt Gödel think his heart had permanent damage?