Postural orthostatic tachycardia syndrome
condition in which a change from lying to standing causes an abnormally large increase in heart rate
Postural orthostatic tachycardia syndrome (POTS) is a condition characterized by an abnormal increase in heart rate upon sitting up or standing. POTS in adults is characterized by a heart rate increase of 30 beats per minute within ten minutes of standing up, accompanied by other symptoms. This increased heart rate should occur in the absence of a significant drop in blood pressure. POTS is a disorder of the autonomic nervous system that can lead to a variety of symptoms. Upon standing, individuals can experience lightheadedness, blurred vision, heart palpitations, weakness and tremor (shaking). In addition, individuals can experience fatigue, headaches, brain fog, exercise intolerance, nausea, difficulty concentrating, chest pain, and shortness of breath.
POTS is thought to be caused by problems in the autonomic nervous system, which controls heart rate and blood flow. These problems may include blood pooling in the legs, reducing blood return to the heart, or the heart beating faster to make up for low blood pressure. It can develop after a viral infection, surgery, trauma, autoimmune disease, or pregnancy. For instance, it can emerge after contracting COVID-19, as part of long COVID, or possibly in rare cases after COVID-19 vaccination, though causative evidence is limited and further study is needed.
The public source identifies “Postural orthostatic tachycardia syndrome” as condition in which a change from lying to standing causes an abnormally large increase in heart rate. This brief keeps that definition visible, then builds a research path around Postural, orthostatic and tachycardia.
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