Not sure: Perhaps you do not hyperventilate long enough or hard enough to make heart rate rise. Why do you hyperventilate in the first place would be my question to you? What causes you to do so? Is this an issue that can be addressed for you? I would not be so worried about your heart rate not rising and more interested in what causes you to hyperventilate and how to address that issue. Dr R
Answered 9/23/2016
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