This might help:

Criteria for Panic Attack

A discrete period of intense fear or discomfort, in which four (or more) of the following symptoms developed abruptly and reached a peak within 10 minutes:
  1. palpitations, pounding heart, or accelerated heart rate
  2. sweating
  3. trembling or shaking
  4. sensations of shortness of breath or smothering
  5. feeling of choking
  6. chest pain or discomfort
  7. nausea or abdominal distress
  8. feeling dizzy, unsteady, lightheaded, or faint
  9. derealization (feelings of unreality) or depersonalization (being detached from oneself)
  10. fear of losing control or going crazy
  11. fear of dying
  12. paresthesias (numbness or tingling sensations)
  13. chills or hot flushes