A 1styr medical student presents with recurrent episodes aof choking sensation, breathlessness, intense sweating along with feeling of impending doom. Usually the episodes occur prior to exams. What is the most likely diagnosis?

Panic attack:An acute attack of intense anxiety, witha 'feeling of impending doom' Patient present with Palpitations, choking sensations, chest pain, dizziness, depersonalization , derealization Fear of having a hea attack, dying or going mad Panic disorder:Recurrent and unexpected panic attacks Serotonin, norepinephrine and GABA are the major neurotransmitters involved in panic attacks. Cholecystokinin and pentagastrin (which acts on CCK receptors) are also known to cause panic attacks.