The DSM-IV-TR diagnostic criteria for<unk>  require unexpected, recurrent<unk>  attacks, followed in at least one instance by at least a month of a significant and related behavior change, a persistent concern of more attacks, or a worry about the attack's consequences. There are two types, one with and one without agoraphobia. Diagnosis is excluded by attacks due to a drug or medical condition, or by<unk>  attacks that are better accounted for by other mental<unk> s. The ICD-10 diagnostic criteria: The essential feature is recurrent attacks of severe anxiety<unk> , which are not restricted to any particular situation or set of circumstances and are therefore unpredictable. The dominant symptoms include: * sudden onset of palpitations *chest pain *choking sensations *dizziness * feelings of unreality (depersonalization or derealization) * secondary fear of dying, losing control, or going mad<unk>  should not be given as the main diagnosis if the person has a depressive<unk>  at the time the attacks start; in these circumstances, the<unk>  attacks are probably secondary to depression. The<unk>  Severity Scale <unk> SS) is a questionnaire for measuring the severity of<unk> .
Panic disorder
Hyperthyroidism
Depression 
Cardiovascular disease
Late life depression
Hypochondriasis
Blood phobia
Anxiety disorder