New York, Mar 10 : Miley Cyrus is suffering from a heart condition, it isn't life threatening, reveals her autobiography.
In her new autobiography, `Miles to Go', the `Hannah Montana' star has written that she has tachycardia, which means that her heart rate exceeds 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," The New York Daily News quoted Miley as saying in the tome.