| http://www.w3.org/ns/prov#value | - POTS is defined as an increase in HR (heart rate) of more than 30 beats/min upon standing upright or a maximum HR of at least 120 beats/min, with associated signs and symptoms such as fatigue, nausea, headache, visual disturbances, tremulousness, diaphoresis, hypocapnia and/or peripheral venous pooling [6,7].
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