Identify Anxiety Disorder Based on Symptoms

A 28-year-old female presents to the emergency department with severe palpitations, shortness of breath, and a feeling of impending doom. During the evaluation, she expresses that these episodes typically peak in intensity within ten minutes and are often accompanied by feelings of unreality. After a thorough assessment, the nurse suspects that the patient's symptoms are consistent with an anxiety disorder known as ________. The patient has also mentioned that she avoids situations where she fears these episodes might occur, further impacting her daily functioning.

Based on the information provided, determine the specific anxiety disorder the patient is experiencing, which is characterized by random and unexpected attacks of intense fear and discomfort.