POTS stands for postural tachycardia syndrome and is a disease characterized by the heart rate climbing 30 beats per minute or more when the patient stands, according to the Autonomic Disorders Consortium. This increase in heart rate comes with no major change in blood pressure.
Other symptoms of POTS include discomfort in the head and neck, visual changes, weakness or poor concentration over a period of at least six months. Beta-blockers or alpha-2 agonists are medicines used to treat the disorder. Other treatments include orthostatic exercise and drinking water, but no single treatment has proven completely effective. The disorder generally improves on its own, and after several months many patients are symptom-free.