Hyperventilation syndrome

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Hyperventilation syndrome is anxiety-related dyspnea and tachypnea often accompanied by systemic symptoms.
Hyperventilation syndrome most commonly occurs among young women but can affect either sex at any age. It is sometimes precipitated by emotionally stressful events. Hyperventilation syndrome is separate from panic disorder, although the two conditions overlap; about half of patients with panic disorder have hyperventilation syndrome and one quarter of patients with hyperventilation syndrome have panic disorder.
Hyperventilation syndrome occurs in 2 forms:

Acute: Acute form is easier to recognize than the chronic.
Chronic: Chronic hyperventilation is more common than acute.