verb (used without object), hyperventilated, hyperventilating.
to be afflicted with hyperventilation; breathe abnormally fast and deep.
verb (used with object), hyperventilated, hyperventilating.
to cause (a patient) to breathe more rapidly and deeply than normal.

1930–35; back formation from hyperventilation

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World English Dictionary
hyperventilate (ˌhaɪpəˈvɛntɪleɪt)
(intr) to breathe in an abnormally deep, long, and rapid manner, sometimes resulting in cramp and dizziness

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The two stars together were enough to make fans hyperventilate.
People are being caused to hyperventilate about sea level rises because of
  glacial melting.
Be calm, don't get so hyped up that you tax an already effected and taxed
  respiratory system, ie freak out and hyperventilate.
If you do hyperventilate, cover your mouth and nose with the paper bag.
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