POTS verständlich erklärt: Symptome, Alltagsbelastung und was beim Stehtest passiert

POTS Explained: Symptoms, Daily Life Impact, and What Happens During a Stand Test

What is POTS really? Symptoms, daily-life impact and how stand tests work, explained clearly and without exaggeration.

When people first hear about POTS, they often think it's "just" a fast heartbeat. But postural orthostatic tachycardia syndrome is much more than that – it affects the regulation of the entire circulatory system and can significantly limit daily life. This article explains the medical background of POTS, how it feels in everyday life, and what actually happens during a stand test.

What exactly is POTS?

POTS belongs to a group of conditions called orthostatic intolerance – symptoms that occur upon standing and improve when lying down. Orthostatic intolerance is the term used to describe symptoms that occur when a person stands up and can be relieved by lying down. These symptoms, often dizziness or fainting, happen because not enough blood flows back to the heart when moving from lying or sitting to standing. The classic symptom of POTS is a fast heartbeat: heart rate may increase by more than 30 beats per minute or exceed 120 beats per minute within 10 minutes of standing. In adolescents, the threshold is somewhat higher. For a clear distinction: POTS is characterized by two factors: a specific group of symptoms that frequently occur when standing upright, and a heart rate increase from horizontal to standing of at least 30 beats per minute in adults, or at least 40 beats per minute in adolescents, measured during the first 10 minutes of standing. The diagnosis is only made when orthostatic hypotension – a significant drop in blood pressure – has been ruled out, and when there is no acute dehydration or blood loss. So in POTS, blood pressure usually remains largely stable while the pulse rises sharply.

POTS can occur on its own or alongside other conditions – for example following viral infections. Studies show that POTS could be diagnosed in about one-third of well-characterized, highly symptomatic long COVID patients, and more broadly that 67% of long COVID patients develop moderate to severe dysautonomia, most often presenting as POTS or orthostatic intolerance.

How does POTS affect daily life?

POTS is not a harmless inconvenience. It is important to recognize that this syndrome is typically disabling; the mere observation of orthostatic tachycardia is not, by itself, sufficient to make the diagnosis of POTS. Beyond a racing heart, people affected often report a wide range of additional symptoms. Commonly reported symptoms include orthostatic intolerance with lightheadedness, palpitations, tremor, weakness, blurred vision and exercise intolerance, but also non-postural symptoms including bloating, nausea, diarrhea, and abdominal pain, as well as systemic symptoms such as fatigue, sleep issues, migraines and "brain fog". This variety of symptoms explains why POTS is often misunderstood: it doesn't necessarily look "severe" from the outside, yet it feels exactly that way to those experiencing it. Even activities of daily living, such as bathing or housework, may greatly exacerbate symptoms with resultant fatigue, posing significant limitations on functional capacity.

Research increasingly addresses the psychological toll as well: repeated episodes of dizziness or near-fainting can create ongoing uncertainty in everyday situations and noticeably reduce both physical and mental quality of life. For many people with POTS, this means constantly weighing how long they can stand, how quickly they can get up, or how long they can wait in a line – often without others recognizing this invisible burden.

What happens during a stand test?

Several test methods exist to detect orthostatic intolerance such as POTS – ranging from a simple clinical exam to more elaborate lab-based testing. They mainly differ in how actively the body is involved in the transition from lying to standing.

An important point applies across all these methods: these tests can document abnormal heart rate and blood pressure responses and confirm orthostatic intolerance, but they cannot definitively diagnose autonomic disorders on their own – diagnosis requires clinical interpretation by a qualified medical provider who applies the full diagnostic criteria and rules out other possible causes of the symptoms. If you're looking for background on how such a test typically works, our stand test guide provides more detail – though it explicitly does not replace a medical examination or diagnosis.

What does this mean for everyday life with POTS?

A POTS diagnosis doesn't automatically mean nothing can be changed. Over time, many people affected learn to better estimate their limits and adjust daily routines accordingly – for example, standing up slowly, taking sufficient breaks while sitting or lying down, and being mindful of exertion peaks. Such strategies don't replace medical treatment, but they can help make everyday life more manageable. It remains important to keep in mind that POTS is a complex condition that varies significantly from person to person. If you experience persistent symptoms such as a racing heart, dizziness, or a tendency to faint upon standing, a medical evaluation is the right first step – particularly to rule out other, sometimes treatable, causes.

Note: mypacing is not a medical device and does not replace a medical diagnosis or treatment. The app can help make your own everyday patterns more visible, but it does not replace a specialist medical evaluation if POTS is suspected.

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