There are lots of different treatments you can have to fix the problem of an irregular heart beat, which is called tachycardia.

CNN: 'I'd be an invalid without this device'

Tachycardia doesn't go away but without this I would be an invalid.

CNN: 'I'd be an invalid without this device'

In 2003, at the age of 15, as she was training for a spot on the 2004 team heading to Athens, Vollmer was diagnosed with a heart condition called supraventricular tachycardia.

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