Really fickle quiz give or take a few heart disease?

I'm trying to write this story about a teenage boy who has a problem next to his heart. What are some heart diseases that could fit this description. I guess it doesn't really have to be a heart disease, any disease, really. It has to be something that he can usually function on a daily principle, but then he has a serious relapse (or whatever the residence is) and is hospitalized, in need of a heart(/or another surgery depending on whatever suggestions you guys impart me) transplant. I know this question sounds a bit dumb, but I don't really know that much about this kind of issue...gratefulness
Answers:
he could have a hole contained by is heart and if u get it publishd and it becomes famise u should say too
mandie hick who is loveing and crap close to that lol jkng
He could have a viral cardiomyopathy. That is a virus similar to a cold or flu, but it infects the heart, and suddenly the heart gets very, very watery and a young person could urgently need a transplant. You would hold to check details online if you use it in a story though to avoid having wrong details in your book.
The other is Wolff-Parkinson-White syndrome, which cause blackout like fainting spells. He would need the electrical system of his heart treated beside "ablation" in the hospital. Also called WPW.
Teenage boy so congenital heart defect would fit.

Let's go with mitral spigot prolapse. He then get a bacterial infection seeding into the blood stream (sepsis). Next, he develops infective endocarditis (bacteria growing on the valve). It cause scaring and further damage the defective valve. Then he wants surgery to replace the valve with a prosthetic one.

Good luck

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