The COVID-19 pandemic didn’t just bring acute illness—it revealed a troubling pattern of persistent symptoms affecting millions of people long after the initial infection cleared. Among the most common and debilitating manifestations of long COVID are symptoms strikingly similar to Postural Orthostatic Tachycardia Syndrome, leaving many patients and doctors wondering: Is this long COVID, POTS, or both?
The overlap between these conditions isn’t coincidental. Research increasingly shows that long COVID frequently includes or triggers POTS, with shared mechanisms explaining why the symptoms look so similar. Understanding this connection is crucial for getting proper diagnosis and effective treatment.
Let’s explore why long COVID symptoms overlap so significantly with POTS, what this means for patients experiencing both, and how to navigate diagnosis and treatment.
The Surge of Post-COVID POTS
Before the pandemic, POTS was relatively rare, affecting an estimated 1-3 million Americans. Then COVID-19 hit, and dysautonomia specialists noticed a dramatic surge in patients developing POTS-like symptoms after infection.
Studies now estimate that 2-14% of COVID-19 patients develop long COVID, with autonomic dysfunction—particularly POTS—among the most common manifestations. Some research suggests 30% or more of long COVID patients meet diagnostic criteria for POTS when properly tested.
This explosion of cases brought unprecedented attention to post-viral dysautonomia and accelerated research into why viral infections trigger autonomic dysfunction.
Understanding POTS as a Form of Dysautonomia
To understand the overlap, we first need to clarify what POTS is. Understanding POTS as a form of dysautonomia helps frame it as a specific type of autonomic nervous system dysfunction.
POTS is characterized by:
- Excessive heart rate increase (30+ beats per minute) upon standing
- Symptoms of orthostatic intolerance (dizziness, lightheadedness, fatigue)
- Duration of at least 6 months
- No significant blood pressure drop that would indicate a different condition
The autonomic nervous system controls automatic body functions—heart rate, blood pressure, digestion, temperature regulation. When this system malfunctions, the body struggles to maintain stability, especially during position changes.
Common Symptoms: Long COVID and POTS
The symptom overlap between long COVID and POTS is extensive, which is why many long COVID patients have undiagnosed POTS:
Cardiovascular Symptoms:
Rapid Heartbeat: Both conditions cause tachycardia, particularly noticeable when standing or with minimal exertion.
Palpitations: The sensation of heart racing, pounding, or skipping beats appears in both.
Chest Pain or Discomfort: Non-cardiac chest discomfort is common in both conditions.
Blood Pressure Fluctuations: Unstable blood pressure regulation affects many patients with either condition.
Orthostatic Symptoms:
Dizziness Upon Standing: Perhaps the most characteristic shared symptom—feeling lightheaded or dizzy when standing up from sitting or lying down.
Lightheadedness: General feeling of unsteadiness or that you might faint.
Near-Fainting or Fainting: Some patients with either condition experience actual syncope.
Neurological Symptoms:
Brain Fog: Difficulty concentrating, memory problems, and mental cloudiness plague both long COVID and POTS patients.
Headaches: Frequent or persistent headaches are common in both.
Difficulty Finding Words: Cognitive symptoms affecting speech and word retrieval.
Energy and Fatigue:
Crushing Fatigue: Profound exhaustion not relieved by rest appears in both conditions.
Post-Exertional Malaise: Symptom worsening after physical or mental exertion—sometimes delayed by 24-48 hours.
Exercise Intolerance: Inability to tolerate physical activity that was previously manageable.
Other Overlapping Symptoms:
Shortness of Breath: “Air hunger” or feeling unable to get enough air despite normal oxygen levels.
Gastrointestinal Issues: Nausea, bloating, abdominal pain, and altered bowel habits.
Sleep Disruption: Poor sleep quality, insomnia, or non-restorative sleep.
Temperature Dysregulation: Feeling abnormally hot or cold, excessive sweating, or inability to sweat.
Given this extensive overlap, distinguishing between long COVID with autonomic symptoms and actual POTS becomes challenging without proper testing.
Root Causes Shared Between Long COVID and POTS
Root causes shared between long COVID and POTS help explain why the conditions look so similar—they often involve the same underlying mechanisms.
Viral Effects on the Autonomic Nervous System:
Direct Nerve Damage: SARS-CoV-2 may directly damage small nerve fibers controlling autonomic functions. Skin biopsies in some long COVID patients show reduced small fiber nerve density, consistent with post-viral neuropathy.
Inflammation: COVID-19 triggers widespread inflammation that can persist long after viral clearance. This ongoing inflammation affects autonomic nerves and their function.
Vascular Damage: The virus damages endothelial cells lining blood vessels, affecting their ability to constrict and dilate properly—a key problem in POTS.
Microclots: Some researchers have found persistent microclots in long COVID patients that may reduce circulation and oxygen delivery, potentially contributing to POTS-like symptoms.
Immune System Dysregulation:
Autoantibody Production: Studies have detected autoantibodies in long COVID patients targeting:
- Adrenergic receptors (affecting blood vessel constriction and heart rate)
- Muscarinic receptors (affecting parasympathetic nervous system)
- Other autonomic nervous system components
These antibodies can interfere with normal autonomic signaling, creating POTS-like dysfunction.
Persistent Immune Activation: The immune system remains activated in some patients, creating ongoing inflammation and potentially attacking the body’s own tissues—classic autoimmune mechanisms.
Blood Volume and Circulation Problems:
Hypovolemia: Some long COVID patients develop low blood volume, a known trigger for POTS symptoms.
Venous Pooling: Blood pools excessively in the legs and lower body due to impaired blood vessel tone, reducing blood flow to the brain when standing.
Endothelial Dysfunction: Damaged blood vessel lining affects circulation regulation throughout the body.
Deconditioning:
Prolonged illness and recovery periods cause significant physical deconditioning. Bed rest and inactivity lead to:
- Reduced blood volume
- Weakened cardiovascular reflexes
- Decreased muscle strength and endurance
- Worsened orthostatic intolerance
This deconditioning can trigger or perpetuate POTS symptoms even as the acute infection resolves.
Symptoms That Indicate POTS Versus General Dysautonomia
While symptoms that indicate POTS versus general dysautonomia can help distinguish between conditions, the key POTS indicator is the dramatic, sustained heart rate increase upon standing.
POTS-Specific Features:
Positional Trigger: Symptoms dramatically worsen when upright and improve when lying down. If your fatigue, brain fog, and dizziness significantly lessen when you lie flat, POTS is more likely than general post-viral fatigue.
Measurable Heart Rate Change: Your heart rate increases by 30+ beats per minute within 10 minutes of standing. You can measure this at home with a pulse oximeter or fitness tracker.
Duration: POTS symptoms must persist for at least 6 months, though many long COVID patients seek help sooner if symptoms are severe.
Blood Pressure Pattern: Unlike orthostatic hypotension, POTS doesn’t involve a significant blood pressure drop upon standing—blood pressure typically remains normal or even increases.
Autoimmune Mechanisms in Both Conditions
Autoimmune mechanisms in both conditions represent a crucial link explaining the long COVID-POTS connection.
Research has found that many long COVID patients with POTS-like symptoms have detectable autoantibodies:
Types of Autoantibodies Found:
G-Protein-Coupled Receptor (GPCR) Antibodies: Target receptors that regulate heart rate, blood pressure, and other autonomic functions.
Adrenergic Receptor Antibodies: Interfere with the body’s response to adrenaline and noradrenaline, crucial for blood pressure regulation.
Muscarinic Receptor Antibodies: Affect the parasympathetic nervous system, which controls rest and digestion responses.
Endothelial Cell Antibodies: Target blood vessel lining, contributing to vascular dysfunction.
The presence of these antibodies supports the theory that long COVID POTS is, at least partially, an autoimmune condition. The immune response triggered to fight COVID-19 doesn’t properly turn off and begins attacking the patient’s own autonomic nervous system.
Why Long COVID Patients Experience POTS Episodes
Why long COVID patients experience POTS episodes relates to how autonomic dysfunction manifests in response to triggers.
Long COVID patients may experience acute worsening of symptoms—episodes that feel like crashes or flare-ups. These episodes often occur in response to:
Physical Exertion: Even mild activity like showering, walking, or standing for extended periods can trigger acute symptom worsening.
Mental Exertion: Concentration, stress, or cognitive demands can precipitate episodes.
Temperature Changes: Heat exposure often dramatically worsens symptoms.
Postural Changes: Moving from lying to sitting to standing frequently triggers episodes.
Dehydration: Even mild fluid deficits can cause acute worsening.
Hormonal Fluctuations: Women often notice symptom patterns tied to menstrual cycles.
These episodes reflect the underlying autonomic instability—the nervous system struggles to maintain balance and tips into dysfunction when challenged.
Testing and Diagnosis: Distinguishing Long COVID from POTS
The crucial question many patients face: “Do I have long COVID with some autonomic symptoms, or do I actually have POTS?”
The answer often is: both. Long COVID and POTS aren’t mutually exclusive—POTS can be part of your long COVID syndrome.
Diagnostic Testing:
Tilt Table Test: The gold standard for POTS diagnosis. You’re tilted upright on a table while heart rate and blood pressure are continuously monitored. A sustained heart rate increase of 30+ bpm without significant blood pressure drop confirms POTS.
Active Stand Test: A simpler version you can do at home or in a clinic. Heart rate and blood pressure are measured lying down, then immediately upon standing and at 2, 5, and 10 minutes while standing. Sustained elevation confirms POTS.
Autonomic Function Testing: Comprehensive testing may include QSART (sweat testing), heart rate variability analysis, and other assessments of autonomic nervous system function.
Blood Work: Checking for inflammation markers, autoantibodies, thyroid function, vitamin deficiencies, and other treatable conditions that might contribute to symptoms.
Cardiac Evaluation: EKG and possibly echocardiogram to rule out primary heart conditions.
When to Pursue POTS Testing:
If you have long COVID and notice:
- Symptoms consistently worse when standing, better when lying down
- Heart rate increases dramatically with standing or minimal activity
- Inability to tolerate upright positions for normal durations
- Dizziness, lightheadedness, or near-fainting with position changes
- Symptoms persisting beyond 3-6 months
You should discuss POTS evaluation with a long COVID doctor in Maryland or dysautonomia specialist who can perform appropriate testing.
Sleep Disruption in Both Conditions
Sleep disruption in both conditions creates a vicious cycle worsening both long COVID and POTS symptoms.
How Sleep Problems Contribute:
Autonomic Dysfunction During Sleep: The autonomic nervous system doesn’t “rest” properly during sleep, preventing restorative rest.
Elevated Nighttime Heart Rate: Some patients maintain elevated heart rates even while sleeping, preventing deep sleep stages.
Frequent Awakenings: Autonomic instability can cause multiple nighttime awakenings.
Sleep Architecture Disruption: Even when sleeping adequate hours, the quality is poor—less time in deep, restorative sleep stages.
The Vicious Cycle:
Poor sleep worsens autonomic function, which worsens POTS symptoms, which disrupts sleep further, perpetuating the cycle. Breaking this cycle often requires addressing both the autonomic dysfunction and sleep hygiene simultaneously.
Treatment: Addressing Both Long COVID and POTS
Treatment for long COVID-related POTS combines standard POTS management with strategies addressing the post-viral component:
Foundational Interventions:
Increased Fluids and Salt: Target 2-3 liters of fluid daily and 3,000-10,000 mg sodium per day as directed by your healthcare provider. This increases blood volume, reducing heart rate and improving symptoms.
Compression Garments: Waist-high compression stockings or abdominal binders prevent blood pooling in the lower body.
Small, Frequent Meals: Large meals can trigger symptom flares by diverting blood to digestion.
Temperature Management: Avoiding heat, using cooling devices, and managing environment to prevent heat-triggered flares.
Medications:
Medications are often used off-label and should be prescribed under specialist supervision:
Beta-Blockers (propranolol, metoprolol): Reduce heart rate and sympathetic nervous system activity.
Fludrocortisone: Helps retain salt and water, increasing blood volume.
Midodrine: Constricts blood vessels, preventing blood pooling.
Ivabradine: Directly slows heart rate without affecting blood pressure.
SSRIs or SNRIs: May help autonomic regulation and address secondary anxiety or depression.
Reconditioning and Rehabilitation:
Carefully designed exercise programs, starting with recumbent activities (rowing, recumbent cycling, swimming) and gradually progressing, can rebuild cardiovascular fitness and improve autonomic function.
This must be done slowly to avoid post-exertional malaise. Many programs follow specific protocols developed for POTS and long COVID patients.
Addressing Immune Dysregulation:
For patients with evidence of autoimmune mechanisms or severe symptoms:
Anti-inflammatory Approaches: Diet modifications, omega-3 fatty acids, and other anti-inflammatory strategies.
Antihistamines: For patients with mast cell activation component.
Low-Dose Naltrexone: May reduce inflammation and modulate immune function in some patients.
Immunotherapy: In severe cases with positive autoantibody testing, treatments like IVIG (intravenous immunoglobulin) or plasmapheresis may be considered.
These are prescribed under specialist supervision based on individual patient factors.
Prognosis: Long COVID POTS vs. Primary POTS
One important distinction between long COVID POTS and primary POTS is the potential for recovery:
Long COVID POTS Recovery:
Many long COVID POTS patients show gradual improvement over 6-24 months, particularly with appropriate treatment and reconditioning. Some recover completely, while others experience significant improvement even if some symptoms persist.
Recovery factors include:
- Early diagnosis and treatment
- Adherence to management strategies
- Avoiding deconditioning
- Managing flare triggers
- Addressing underlying immune dysfunction if present
However:
Not all long COVID POTS resolves. In a small proportion, symptoms persist beyond one year and resemble primary POTS, requiring long-term management. We’re still learning why some patients recover while others develop chronic POTS.
Finding Specialized Care
Given the complex overlap between long COVID and POTS, finding providers who understand both conditions is crucial.
A long COVID treatment specialist in Maryland or POTS dysautonomia specialist in Maryland can:
- Perform appropriate diagnostic testing
- Distinguish between long COVID autonomic symptoms and diagnosable POTS
- Create comprehensive treatment plans addressing both conditions
- Monitor recovery and adjust treatments as needed
- Coordinate care with other specialists when needed
Don’t settle for providers who dismiss your symptoms as “just anxiety” or “just deconditioning.” The autonomic dysfunction is real and measurable.
Living with Long COVID POTS
Managing the overlap between long COVID and POTS requires:
Patience: Recovery often takes months to years. Progress may be slow and nonlinear.
Pacing: Learning to balance activity and rest to avoid triggering post-exertional malaise.
Tracking: Keeping symptom diaries helps identify triggers and track progress.
Support: Connecting with other patients facing similar challenges provides validation and practical tips.
Advocacy: Educating family, employers, and providers about your condition ensures proper support.
Hope: Many patients improve significantly with proper diagnosis and treatment. Recovery is possible.
The Bottom Line
Why do long COVID symptoms overlap so extensively with POTS? Because in many cases, long COVID includes or triggers POTS. The virus affects the autonomic nervous system through multiple mechanisms—direct nerve damage, autoimmune activation, vascular dysfunction, and inflammation—creating the characteristic POTS pattern of orthostatic intolerance and tachycardia.
Understanding this connection is crucial for proper diagnosis and treatment. If you have long COVID with symptoms that worsen when standing, rapid heart rate, dizziness, and fatigue that improves when lying down, you should be evaluated for POTS.
The overlap isn’t coincidental—it reflects shared mechanisms and often represents the same underlying autonomic dysfunction. Treatment addressing both the post-viral component and the autonomic dysfunction offers the best chance for improvement.
If you’re struggling with long COVID symptoms or suspect POTS, seek evaluation from a long COVID doctor in Maryland or dysautonomia specialist who can provide proper testing and comprehensive treatment. Early intervention may improve outcomes and prevent chronic disability.
You’re not alone in this experience, and with proper care, improvement is possible.
