Table 1.

Clinical manifestations and their relative frequencies in POTS.

Clinical manifestation	Frequency
Chronic fatigue	85-95%
Dizziness	60-80%
Palpitations	40-55%
Exercise intolerance	50-85%
Blurred vision	70%
Chest discomfort	60%
Headache	50%
Dyspnoea	40%
Syncope	40-50%