Miley Cyrus has a heart condition, but don’t worry, it won’t send her to The Mickey Mouse Club up beyond the clouds anytime soon.

The Hannah Montana has tachycardia, which makes her heart rate exceed the range of a normal resting heart rate.

“The type of tachycardia I have isn’t dangerous. It won’t hurt me, but it does bother me. There is never a time onstage when I’m not thinking about my heart,” Miley reveals in her new memoir, Miles to Go.