How old was Miley Cyrus when she found out she had tachycardia?

Answer 1

Yes, but she says that the kind she has cannot hurt her. She also says that when she gets in stressful situations that can cause her heart rate to increase she imagines herself ten years from now and whether the current situation will have an impact on where she wants to be in ten years and that it rarely does.

Answer 2

15 years of age and her sister has Breast cancer