Introduction
**POTS disease** commonly known as **Postural Orthostatic Tachycardia Syndrome** is a condition involving the nervous system. The autonomic nervous system controls automatic functions of the body including heart rate, blood pressure, breathing, digestion and temperature regulation.
People with POTS may experience an increase in heart rate when moving from lying down or sitting to standing. This change can be accompanied by dizziness, lightheadedness, fatigue, weakness, brain fog, headaches, palpitations and exercise intolerance.
POTS can affect life considerably but the condition varies from person to person. Some individuals experience mild symptoms while others may have symptoms that make school, work, exercise or normal household activities difficult.
POTS is not simply a heartbeat. It involves problems with how the body regulates circulation when a person changes position. Diagnosis generally requires an assessment and appropriate testing because several other conditions can cause similar symptoms.
This article explains what POTS disease is, its symptoms, causes, risk factors, diagnosis, treatment options, lifestyle strategies and when medical attention is necessary.
What Is POTS Disease?
POTS disease is a form of ** intolerance** meaning symptoms occur or become worse when a person is upright.
When a healthy person stands, gravity causes some blood to move toward the body. The autonomic nervous system normally responds by adjusting blood vessels and heart rate to maintain blood flow to the brain.
In people with POTS this response does not work normally. The heart rate may increase significantly after standing. The person may develop symptoms such as dizziness, weakness, palpitations or difficulty concentrating.
According to Johns Hopkins Medicine POTS is characterized by an increase in heart rate when standing and symptoms of orthostatic intolerance.
The condition is usually chronic although symptoms can fluctuate over time.
POTS Symptoms
POTS symptoms can differ considerably between individuals. They may become more noticeable after standing for a period of time exercising, taking a shower or being dehydrated.
Common symptoms include:
- Rapid heartbeat after standing
- Dizziness
- Lightheadedness
- Feeling faint
- Fatigue
- Weakness
- Brain fog
- Headache
- Heart palpitations
- Trembling
- Sweating
- Nausea
- Exercise intolerance
- Difficulty concentrating
- tunnel vision
- Chest discomfort in some people
Symptoms may improve after sitting or lying down.
Rapid Heart Rate
One of the defining features of POTS is an increase in heart rate after standing.
Some people describe a pounding, racing or fluttering sensation in the chest. This can be frightening particularly when it happens unexpectedly.
However a fast heart rate can have causes, including dehydration, anemia, infection, thyroid disorders, medications, anxiety and heart rhythm problems. Therefore a fast heartbeat alone does not establish a diagnosis of POTS.
Dizziness and Lightheadedness
Dizziness is one of the common complaints.
A person may feel unsteady, lightheaded or as though they might faint after standing.
These symptoms can become worse after standing, particularly in warm environments.
Brain Fog
Many people with POTS report symptoms commonly described as “brain fog.”
This may involve:
Difficulty concentrating
Forgetfulness
Slower thinking
Difficulty finding words
Reduced mental stamina
Brain fog can make work studying, reading and conversations challenging.
Fatigue
Persistent fatigue can be another symptom.
Some people feel exhausted after sleeping. Physical activity may temporarily worsen symptoms and recovery after exercise can take longer than expected.
Exercise Intolerance
People with POTS may find exercise unusually difficult.
Activities that were previously easy may trigger:
Rapid heartbeat
Dizziness
Weakness
Breathlessness
Fatigue
Trembling
A designed exercise program can sometimes improve symptoms but individuals should discuss exercise plans with their healthcare professional.
What Causes POTS?
The exact cause of POTS disease is not fully understood.
Researchers believe that different mechanisms may contribute to the condition. These can include blood vessel regulation, reduced blood volume, autonomic nervous system dysfunction, excessive sympathetic nervous system activity and other physiological changes.
POTS can sometimes begin after an illness, surgery, pregnancy, injury or another major physiological event.
In cases however it is difficult to identify one specific trigger.
POTS and the Autonomic Nervous System
The autonomic nervous system controls processes that occur without conscious effort.
These include:
Heart rate
Blood pressure
Digestion
Sweating
Body temperature
Bloodvessel constriction
When a person stands the body needs to adjust circulation.
If this process is impaired the heart may beat faster to compensate for changes in blood flow.
POTS is therefore considered a disorder involving regulation.
Different Forms of POTS
POTS is not identical in every patient.
Researchers and clinicians have described patterns or phenotypes including forms associated with blood volume reduction, increased sympathetic activity and peripheral blood vessel dysfunction.
Some people may have more than one contributing mechanism.
It is important not to assume that everyone with POTS will respond to the treatment. Management is often individualized according to symptoms, medical history, blood pressure, heart rate, hydration status and other factors.
Who Can Develop POTS?
POTS can affect people of all ages but it is particularly recognized in adolescents and younger adults.
It is frequently diagnosed in women although men can also develop the condition.
People with underlying conditions may be more likely to experience autonomic dysfunction.
POTS can also develop following infections or other physiological stressors.
Having one of these factors does not mean a person will definitely develop POTS.
POTS After an Infection
Some people report developing POTS symptoms after an infection.
Viral illnesses can sometimes affect the nervous system or trigger changes that persist after the acute illness has resolved.
POTS has also been reported in association with ** COVID** although postCOVID symptoms can have many different causes.
Anyone who develops rapid heart rate, dizziness, exercise intolerance or fainting after an infection should receive appropriate medical evaluation rather than assuming that POTS is the cause.
How Is POTS Diagnosed?
Diagnosing POTS requires more than measuring the heart rate once.
A healthcare professional generally reviews symptoms, medical history, medications and possible alternative explanations.
Heart rate and blood pressure may be assessed while lying down and after standing.
A **10minute standing test** or **tiltable test** may be used to evaluate the body’s response to posture.
According to Johns Hopkins Medicine, a tilt/table test can help assess changes in heart rate and blood pressure when moving into a position.
Additional tests may be performed to rule out causes of symptoms.
These can include:
* Electrocardiogram (ECG)
Blood tests
Blood pressure monitoring
* Echocardiogram when indicated
* Holter or ambulatory heart monitoring
Thyroid testing
* Tests for anemia or nutritional deficiencies
The exact testing plan depends on the individual.
POTS Diagnostic Criteria
Diagnostic criteria can vary somewhat according to age and clinical guidelines. A sustained increase in heart rate after standing is a key component.
For adults POTS is associated with an increase in heart rate of at least **30 beats per minute within 10 minutes of standing** without the type of significant blood pressure drop that would indicate classic orthostatic hypotension.
In adolescents the heart rate threshold is generally higher.
Symptoms of intolerance must also be present and other conditions that could explain the tachycardia need to be considered.
Because diagnostic criteria are detailed people should not attempt to diagnose themselves solely using a smartwatch or home heart rate monitor.
POTS vs. Orthostatic Hypotension
POTS and orthostatic hypotension can both cause dizziness when standing. They are different conditions.
**Orthostatic hypotension** primarily involves a fall in blood pressure after standing.
**POTS** primarily involves an increase in heart rate with upright posture.
Some people can have overlapping symptoms or more than one circulatory problem.
Medical testing can help distinguish these conditions.
POTS Treatment
There is no treatment that works for everyone with POTS.
Management generally focuses on reducing symptoms, improving circulation, increasing tolerance and addressing contributing factors.
Treatment may involve:
* Increased fluid intake when medically appropriate
Increased salt when recommended by a clinician
Compression garments
Gradual physical reconditioning
Avoiding heat
* Medication in selected cases
* Treatment of associated conditions
The treatment plan should be individualized.
Fluids and Hydration
Adequate hydration can be a part of POTS management.
Some people with POTS have reduced blood volume and increasing fluid intake may help support circulation.
However people with medical conditions—such as heart failure or kidney disease—may have fluid restrictions.
For this reason individuals should discuss fluid intake with their healthcare professional rather than automatically increasing fluids.
Salt Intake
Healthcare professionals may suggest increasing salt intake for some people with POTS because sodium can help the body hold on to fluid and boost the amount of blood in the body.
Too much sodium is not right for everyone.
People with blood pressure, kidney disease, heart disease or other health issues may need different advice.
Salt should be increased when it is needed and usually with help from a doctor.
Compression Garments
Compression garments can help stop blood from collecting in the legs and the belly when standing.
Some people find compression stockings, abdominal compression or other compression garments helpful.
The kind and the tightness can be different.
Compression is usually part of a plan to treat the problem and not used alone.
Exercise and Physical Conditioning
Exercise can be hard for someone with POTS at first.
Slowly getting stronger through physical activity is an important part of managing the condition for many people.
A plan might start with activities that can be done while sitting or lying down like:
Riding a bike while lying down
It Using a rowing machine
Some strength training
Doing aerobic exercises while lying down
As the person gets better they may slowly move to more standing activities.
The goal is not to push through symptoms. Exercise should be made for each person. Done carefully.
Lifestyle Strategies for POTS
Some habits may help some people deal with symptoms.
Change Positions Slowly
Moving slowly from lying down to sitting and then standing gives the body time to adjust.
Avoid Heat
Hot showers, hot weather and warm places can make symptoms worse for some people because heat makes blood vessels get bigger.
Avoid Prolonged Standing
Standing still for a time may make blood collect in the legs.
When possible sitting, walking and changing position may be better.
Eat Regularly
Big meals can make symptoms worse for some people. Smaller balanced meals may be easier for people.
Monitor Triggers
Keeping a record of symptoms may help find patterns.
Possible triggers include:
- Heat
- Not water
- Poor sleep
- Standing too long
- Being sick
- Large meals
- Alcohol
- much exercise
POTS Medications
Some people with POTS need medicine when lifestyle changes are not enough.
Depending on the person’s symptoms doctors may use medicines that change heart rate, blood pressure, blood volume or how blood vessels work.
Some examples that might be used in situations are betablockers, midodrine, fludrocortisone or other medicines.
Choosing the medicine depends on the person’s blood pressure, heart rate, symptoms, other health problems and medicines they are already taking.
There is not one medicine that works for everyone with POTS.
People should not start, stop or change any medicine without talking to a doctor.
Living With POTS
POTS can affect more than the body.
Ongoing dizziness tiredness, confusion and not being able to exercise much may affect:
- School
- Work
- Social time
- Travel
- Exercise
- Doing chores
Symptoms can change. Some days are easier while others are harder.
Making a flexible schedule can help.
People may find it useful to plan rest times, stay hydrated when needed, avoid things that make symptoms worse and slowly build up strength.
POTS and Mental Health
Having a long-term illness can be emotional.
People with POTS may feel frustrated, worried, lonely or have a time living their life because the symptoms are sometimes not clear.
Important to note physical symptoms should not always be seen as coming from anxiety.
POTS is a physical condition and symptoms like a fast heart and dizziness can have real causes.
At the time, support for the mind can be very helpful in dealing with long term illness, stress and life changes.
When Should You See a Doctor?
It is good to see a doctor if you often have:
- A fast heart when standing up
- Ongoing dizziness
- fainting
- Fainting without a reason
- Ongoing tiredness
- Not being able to exercise
- Heartbeats that feel strong
- Strong brain fog
These symptoms can come from things, such as low blood, not enough water, thyroid issues, medicine effects, irregular heartbeats and other health problems.
A doctor can check if POTS or another problem is causing the symptoms.
When Is Emergency Care Needed?
POTS itself is not usually an emergency. Some symptoms can look like serious conditions.
Go to the emergency room for:
- Bad or new chest pain
- Its Very hard to breathe
- Fainting during exercise
- A heart rate that is very fast and does not slow down
- New signs of brain issues
- Very confused
- Losing consciousness with an injury
- Signs that could be a heart attack or stroke
These symptoms should not be automatically seen as POTS.
POTS Prognosis
The way POTS goes is different for each person.
Some people get much better over time while others have symptoms for years.
Symptoms can. Getting better can happen slowly rather than all at once.
Treatment is about getting better at doing things and feeling better, not just getting rid of every symptom.
Working with doctors who know about the system can be very helpful for people with long-lasting or complicated symptoms.
Conclusion
**POTS disease or Postural Orthostatic Tachycardia Syndrome is a condition where the body’s response to standing is not normal.** A main sign is an increase in heart rate when standing up along with symptoms like dizziness, feeling lightheaded, tired, heart palpitations, weakness, brain fog, headaches and trouble exercising.
The exact reason is not always clear. POTS can be linked to blood volume problems with the nervous system, how blood vessels work, infections or other body triggers.
Diagnosis needs medical checking and often includes checking heart rate and blood pressure when the body position changes. Other reasons for symptoms need to be checked.
Treatment is made for each person. Drinking water, having the right amount of salt, wearing compression clothes slowly getting stronger through exercise, avoiding things that make symptoms worse and using medicine when needed can all help.
Even though POTS can change life a lot, many people can get better at doing things with a plan made for them. Anyone with dizziness, a fast heart rate, fainting or unexplained trouble with exercise should see a doctor instead of trying to figure it out on their own.
Frequently Asked Questions(FAQs)
1. What does POTS stand for?
POTS stands for **Postural Orthostatic Tachycardia Syndrome**. It is a condition that involves the system and a big increase in heart rate when standing up.
2. What are the common symptoms of POTS?
Common symptoms are heart rate, dizziness, feeling lightheaded, tired, brain fog, headaches, weakness, heart palpitations, nausea and trouble exercising.
3. Is POTS a heart disease?
POTS mainly involves the system and blood flow, not a normal heart problem. The heart may look normal. The way it works changes a lot.
4. Can POTS cause fainting?
Yes. Some people with POTS. Almost faint, but not everyone with the condition loses consciousness.
5. Can dehydration make POTS worse?
Yes. Not enough water can cause symptoms from standing up for some people. Staying hydrated is often part of managing POTS. The amount needed is different for each person.
6. Can POTS go away?
Some people get much better. Even stop having symptoms while others have symptoms for a long time. The way it goes is different for each person.
7. How is POTS diagnosed?
Diagnosis usually includes checking symptoms and looking at heart rate and blood pressure when the body position changes.
8. Is exercise good for POTS?
Slow planned exercise can help people with POTS. Programs usually start with activities done while sitting or lying down and move slowly based on how the person feels.
9. What triggers POTS symptoms?
Things that can make symptoms worse include standing for too long , not enough water, heat, being sick, not sleeping well, big meals and too much activity.
10. Is POTS dangerous?
POTS can change life a lot. It is not usually seen as a life-threatening condition. However symptoms, like bad chest pain, serious breathing trouble or fainting during exercise need urgent medical help .
