57 一位48歲男性中學教師，因帶高三班級，工作緊張，最近一個月來在學校、家裡和公共場所，先後4次突然地出現心慌、心悸、胸悶、頭暈、噁心、肢體麻木。為此送醫院急診，但其症狀都在半小時內緩解。本案例最可能的診斷是：

癲癇發作 恐慌症 失憶症 心律不整

According to DSM-IV-TR, a panic attack is characterized by four or more of the following symptoms:

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. feelings of unreality (derealization) or being detached from oneself (depersonalization)
   
10. fear of losing control or going crazy
    
11. fear of dying
    
12. numbness or tingling sensations (paresthesias)
    
13. chills or hot flushes

The presence of fewer than four of the above symptoms may be considered a limited-symptompanic attack.