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A 20-year-old male asked:

What are some endocrine causes of extremely hard and kind of fast heartbeat, but normal when relaxed? any information would be greatly appreciated.

1 doctor answer1 doctor weighed in
Dr. David Sneid
Endocrinology 41 years experience
If you are on: thyroid replacement, make sure your levels are normal. There are a variety of potential causes, not just hormonal. Because of the complexity of your particular situation, it's best to discuss it with your doctors who are familiar with your case.

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Last updated Aug 17, 2014

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