What should a cardiomyopathy patient confirm before signing to authorize a hospital to use their medical case for public education?

First confirm which text, images, or audio will be made public, on which channels, and whether they could still be identified by acquaintances. Ask whether you can review the content to be published, whether refusing authorization affects normal medical care, and whether you can withdraw authorization before and after publication. For parts you do not want made public, state this clearly; if you do not understand the scope of authorization, you can ask the other party to explain before deciding.