my psycho doctor | jjk

Let's just put this in a simple way.

A girl named april has had heart problems since she was young.
Her mom has been searching to find a good doctor to help her.
Normally none of them can help april.
So she's back at base 1.
Later her mom tells april that she has found a new doctor for her.
He has a professional record as a doctor who has helped many people.
His name?

Jeon Jungkook.