Conversation so far:
Where was Kurt Gödel Born?
Gödel was born in Brünn, Austria-Hungary.
When was Kurt Gödel born?
Gödel was born April 28, 1906, in Brünn, Austria-Hungary.
What was Kurt Gödel's home life like?
Throughout his life, Gödel would remain close to his mother; their correspondence was frequent and wide-ranging.
Where did Kurt Gödel go to school during his childhood?
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 during his childhood?
Although Kurt had first excelled in languages, he later became more interested in history and mathematics.
Are there any other interesting aspects about the Kurt Gödel article besides birth, homelife, school, and interests?
At the age of six or seven Kurt suffered from rheumatic fever; he completely recovered, but for the rest of his life he remained convinced his heart suffered permanent damage.

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