Setting continued:

• There doesn't seem to be any consistent precipitating factors. However, bending, stretching, and sustained exercise have all been incriminated in reports in the literature.
• Interestingly, hyperthyroidism and caffeine do not correlate well with SVT, although there is a strong correlation between atrial fibrillation and hyperthyroidism.
• The occurrence of attacks at home, and their variable duration is helpful. Panic attacks tend not to occur at home (safe place) or when the patient is alone; and, they are usually more stereotyped, lasting about 20 to 30 minutes, and following roughly the same pattern.