Postural orthostatic tachycardia syndrome (POTS) is primarily characterized by orthostatic intolerance (an excessively reduced volume of blood returns to the heart when moving from a lying down to a standing position). Orthostatic Intolerance is generally associated with lightheadedness and/or fainting that is typically relieved by lying down again. In people with POTS, these symptoms are also accompanied by a rapid increase in heartbeat. Other symptoms reported in POTS include: Visual changes (i. e. blurry vision) Throbbing of the head Poor concentration Tiredness Gastrointestinal symptoms (i. e. nausea, cramps, bloating, constipation, diarrhea) Shortness of breath Head, neck and/or chest discomfort Weakness Sleep disorders Exercise intolerance Sweating Anxiety
What are the symptoms of Postural orthostatic tachycardia syndrome ?