•Overview
Understanding the Condition
Postural Orthostatic Tachycardia Syndrome (POTS) is a form of dysautonomia — a disorder of the autonomic nervous system, the part of the nervous system that governs involuntary functions including heart rate, blood pressure, digestion, temperature regulation, and breathing. In POTS, the body fails to properly regulate blood circulation when a person transitions from lying down to standing, causing blood to pool in the lower body and triggering a cascade of symptoms that can range from mildly disruptive to profoundly disabling.
The defining diagnostic feature of POTS is a sustained increase in heart rate of 30 beats per minute or more within ten minutes of standing (or reaching 120 bpm or above), without a significant concurrent drop in blood pressure. This distinguishes it from orthostatic hypotension, where blood pressure falls upon standing, though both conditions can co-exist.
POTS is more common than once believed and remains significantly underdiagnosed — particularly in women and young adults, in whom symptoms are frequently attributed to anxiety, deconditioning, or stress. For many patients, the path to diagnosis spans years and multiple specialists. Understanding POTS as a physiological condition with identifiable mechanisms and underlying drivers is the essential first step toward effective care.
•Recognition
Signs and Symptoms
POTS symptoms can vary considerably from person to person in severity, combination, and pattern. They are typically triggered or worsened by standing, prolonged sitting, heat, exertion, eating, and menstrual cycles. Symptoms often fluctuate day to day, which can make the condition particularly difficult to manage without a clear framework.
Cardiovascular and Circulatory
The most recognizable symptoms involve the heart and circulation: a rapid heart rate (tachycardia) upon standing, palpitations, chest pain or pressure, and in some patients low blood pressure. Some patients experience blood pooling in the legs, which may appear visibly discolored or feel heavy.
Neurological and Cognitive
Lightheadedness, dizziness, and near-fainting (presyncope) or fainting (syncope) are hallmark features. Brain fog — difficulty concentrating, word-finding problems, and impaired short-term memory — is one of the most functionally disabling symptoms and is reported by the majority of POTS patients. Headaches and migraines are also common.
Fatigue and Physical Function
Profound fatigue and generalized weakness are nearly universal in POTS and are often disproportionate to activity level. Post-exertional malaise — symptom worsening following physical or cognitive exertion — is frequently reported and overlaps with ME/CFS.
Gastrointestinal
Nausea, bloating, abdominal pain, constipation, diarrhea, and gastroparesis (delayed gastric emptying) are common due to autonomic dysregulation of the gut. Symptoms are often worse after meals when blood is directed toward digestion.
Autonomic and Systemic
Sweating abnormalities — either excessive or absent sweating — tremors, temperature dysregulation, shortness of breath, visual disturbances, and sleep disturbances are frequently reported. Many patients feel significantly worse in warm environments or after hot showers.
These symptoms collectively make routine daily activities — working, attending school, standing in line, cooking — genuinely difficult, and POTS is associated with a quality-of-life impairment comparable to conditions such as congestive heart failure and COPD in research studies.
•Impact
Who is Affected
POTS is estimated to affect between 1 and 3 million Americans, with some estimates suggesting higher prevalence. It most commonly affects women and those assigned female at birth between the ages of 15 and 50, though it can occur at any age, including in children and older adults.
POTS frequently does not occur in isolation. It is strongly associated with hypermobile Ehlers-Danlos Syndrome (hEDS) and Hypermobility Spectrum Disorder (HSD), Mast Cell Activation Syndrome (MCAS), autoimmune conditions, and post-viral syndromes — most notably Long COVID, which has brought unprecedented public and scientific attention to dysautonomia. The triad of hEDS, POTS, and MCAS is now well-recognized in the clinical literature and is seen frequently at GWCIM.
Awareness of POTS has grown significantly in recent years, but diagnostic delay — averaging five or more years in some studies — remains a serious problem, particularly because symptoms are often dismissed as anxiety or labeled as medically unexplained.
•Clinical Process
Conventional Diagnosis and Testing
POTS is a clinical diagnosis supported by objective testing. The primary diagnostic criteria require a sustained heart rate increase of ≥30 bpm (≥40 bpm in adolescents) within ten minutes of standing, without a significant drop in blood pressure, with symptoms of orthostatic intolerance lasting at least three months.
The Tilt Table Test is the diagnostic gold standard, continuously monitoring heart rate and blood pressure as the patient is moved from horizontal to vertical. A more accessible alternative is the NASA Lean Test, in which the patient lies flat and then stands against a wall for ten minutes with measurements taken at intervals — it carries strong diagnostic accuracy for POTS.
Laboratory workup typically includes thyroid and adrenal function, CBC, metabolic panel, vitamin levels, inflammatory markers, and autoimmune panels. Catecholamine testing (supine and standing) can help identify the hyperadrenergic subtype. Holter monitoring or wearable cardiac devices can capture heart rate patterns across daily activities.
Because of the high rate of comorbidity, evaluation for EDS and MCAS should be considered in all POTS patients. At GWCIM, we extend this workup with comprehensive functional medicine laboratory assessment to identify the full picture of factors driving each patient's symptoms.
•Origins
Root Causes and Contributing Factors
POTS is not a single disease but a syndrome with multiple potential underlying mechanisms and drivers, which is why identifying the root cause for each individual patient is essential to effective treatment.
Connective Tissue Dysfunction is one of the most common underlying contributors. In hEDS and HSD, lax connective tissue in blood vessel walls reduces their ability to constrict effectively upon standing, promoting blood pooling and triggering the compensatory heart rate increase that defines POTS.
Autoimmune Mechanisms are increasingly recognized. Autoantibodies targeting adrenergic and muscarinic receptors — components of autonomic signaling — have been identified in a subset of POTS patients, suggesting an autoimmune etiology in some cases.
Post-Viral and Post-Infectious Triggers are among the most common onset mechanisms. POTS frequently develops following viral illnesses including COVID-19, Epstein-Barr virus (mononucleosis), Lyme disease, and other infections. Post-COVID POTS has become one of the most prevalent forms of new-onset dysautonomia globally.
Mast Cell Activation Syndrome (MCAS) can contribute to POTS through the release of vasoactive mediators that destabilize blood pressure and autonomic tone.
Small Fiber Neuropathy — damage to the small autonomic nerve fibers that regulate blood vessel tone — is found in a subset of POTS patients and may be a primary driver of orthostatic intolerance.
Deconditioning and Blood Volume Abnormalities can perpetuate and worsen POTS. Many patients have reduced plasma volume, and physical deconditioning from prolonged illness creates a cycle that amplifies symptoms.
Toxicity and Environmental Factors, including mold exposure and chronic inflammatory response syndrome (CIRS), are recognized contributing factors in some patients.
Hormonal Fluctuations — particularly estrogen — are thought to influence autonomic tone, which may partly explain why POTS disproportionately affects women and why symptoms often worsen with the menstrual cycle, during pregnancy, and in perimenopause.
•Methodology
Our Integrative Medicine Approach
At GWCIM, we understand that POTS is rarely a standalone condition. Effective care requires identifying and addressing the underlying drivers — whether connective tissue dysfunction, post-viral immune dysregulation, mast cell activation, nutritional deficiencies, or hormonal factors — rather than simply managing heart rate in isolation.
Our approach is comprehensive, coordinated, and built around each patient's unique clinical picture. We conduct thorough autonomic assessments and functional medicine evaluations, develop individualized treatment plans, and work closely with our patients over time — adjusting as their condition evolves. We also collaborate with community partners and specialists to ensure that physical medicine, psychological support, and other dimensions of care are fully integrated.
Our treatment framework addresses the condition from multiple angles simultaneously: stabilizing the autonomic nervous system, improving blood volume and circulation, reducing mast cell reactivity, optimizing nutrition and gut health, building safe physical conditioning, and supporting the mental and emotional wellbeing that chronic illness inevitably affects.
•Expertise
Recommended Providers
•Verification
Evidence and Research
Common Questions
For some patients, particularly those whose POTS developed after a viral illness or other identifiable trigger, symptoms can improve significantly or resolve over time with appropriate treatment. For others, POTS is a long-term condition that requires ongoing management. Either way, most patients see meaningful improvement in daily function, energy, and quality of life with a personalized integrative care plan.
Common triggers include standing or prolonged sitting, heat, physical exertion, large meals, dehydration, menstrual cycles, illness, and stress. Identifying and managing individual triggers is an important part of daily life with POTS.
POTS and anxiety can share overlapping symptoms — rapid heart rate, dizziness, and shortness of breath — which often leads to misdiagnosis. The key difference is physiological: in POTS, the heart rate elevation is directly triggered by standing up and is measurable through autonomic testing. It is not driven by psychological stress. Many POTS patients are incorrectly told their symptoms are anxiety-related before receiving a proper diagnosis.
Several evidence-informed strategies can meaningfully reduce POTS symptoms:
- Increased fluid and salt intake to support blood volume
- Compression garments (stockings or abdominal binders) to reduce blood pooling in the legs
- Gradual recumbent exercise (swimming, rowing, or recumbent cycling) to build cardiovascular conditioning without triggering symptoms
- Elevating the head of the bed slightly during sleep
- Smaller, more frequent meals to reduce post-meal blood flow shifts
- Avoiding prolonged standing and heat exposure
Your GWCIM care team will help you tailor these strategies to your individual presentation.
Yes. Post-COVID POTS is one of the more common manifestations of Long COVID, and has been documented in patients regardless of initial illness severity. The autonomic dysfunction appears to stem from immune dysregulation, viral persistence, and in some cases autoantibody activity affecting the nervous system. GWCIM has extensive experience treating post-viral dysautonomia and can evaluate and manage POTS in the context of Long COVID.
These three conditions frequently co-occur and share overlapping mechanisms — a pattern so consistent it is now widely referred to as the "triad" in the clinical literature. Connective tissue laxity in EDS contributes to blood vessel instability. Mast cell mediators in MCAS can destabilize autonomic tone. Treating all three conditions together, rather than in isolation, typically produces the best outcomes.
Yes — and it is one of the most evidence-supported treatments available — but exercise must be approached carefully and strategically. Upright exercise is often not tolerated initially. Recumbent or semi-recumbent exercise (rowing, recumbent cycling, swimming, Pilates) is typically recommended as a starting point, with gradual progression under guidance.
Your initial visit with Ashley Drapeau or Mikhail Kogan will involve a comprehensive review of your history, symptoms, previous evaluations, and current treatments, along with functional medicine laboratory assessment. Together we will develop a personalized, realistic care plan that addresses both the root causes and the day-to-day realities of living with POTS.