Some patients develop postural orthostatic tachycardia syndrome (POTS) after a concussion — causing rapid heart rate, dizziness, and fatigue when standing. This occurs when concussion disrupts the autonomic nervous system, which regulates circulation and heart rate.
Some patients develop postural orthostatic tachycardia syndrome (POTS) after a concussion. POTS causes symptoms such as rapid heart rate, dizziness, fatigue, and lightheadedness when standing or moving upright. This occurs when concussion disrupts the autonomic nervous system — the brain networks responsible for regulating heart rate, blood pressure, and circulation. Understanding why this happens is the first step toward targeted recovery.
Postural orthostatic tachycardia syndrome (POTS) is a condition in which heart rate increases abnormally when a person moves from a lying or sitting position to standing. The diagnostic threshold is generally a heart rate increase of 30 or more beats per minute within 10 minutes of standing, in the absence of a drop in blood pressure.[1]
The autonomic nervous system normally regulates circulation automatically — adjusting heart rate, blood vessel tone, and blood pressure in response to changes in body position. When this regulation becomes unstable, symptoms such as dizziness, fatigue, rapid heart rate, and lightheadedness can occur without any underlying heart disease.
POTS is a disorder of autonomic regulation, not a primary heart condition. The heart is responding to an unstable signal from the nervous system.
Concussion can disrupt the brain networks responsible for autonomic regulation, particularly those located in the brainstem.[2] The brainstem serves as the primary relay center for autonomic control — coordinating the signals that regulate heart rate, blood pressure, blood vessel tone, circulation, and energy distribution throughout the body.
When concussion disrupts these networks, the autonomic system may lose its ability to respond efficiently to changes in body position, physical demand, or sensory input. The result is a state of autonomic dysregulation in which the body's circulatory responses become delayed, exaggerated, or inconsistent.[3]
Symptoms of autonomic dysregulation after concussion may include rapid heart rate, dizziness, fatigue, exercise intolerance, temperature sensitivity, and brain fog — many of which overlap with other post-concussion symptoms, making accurate identification important.
To understand why heart rate spikes when standing, it helps to understand what normally happens when a person moves upright. When you stand:
These adjustments happen automatically and are coordinated by brainstem autonomic networks. After concussion, the signals driving these adjustments may become unstable. If the vasoconstriction response is delayed or insufficient, blood pressure may temporarily drop and blood flow to the brain may be reduced. The heart compensates by increasing its rate in an attempt to restore circulation — producing the rapid heart rate you notice when standing.[4]
Even small fluctuations in how efficiently blood reaches the brain can produce sensations of lightheadedness, dizziness, or cognitive difficulty — which is why these symptoms are often most noticeable shortly after standing or during sustained upright activity.
The step-by-step mechanism is as follows:
| Step | What Happens |
|---|---|
| 1 | You stand — gravity shifts blood downward toward the legs |
| 2 | The brainstem detects the pressure change and signals blood vessels to tighten |
| 3 | After concussion, this signal may be delayed or inefficient |
| 4 | Blood pressure becomes temporarily unstable; circulation to the brain is reduced |
| 5 | The heart compensates by beating faster — producing the heart rate spike |
The important point is that the heart rate increase is often a compensatory response rather than the primary problem. The heart is doing its job — responding to an unstable signal from the brainstem. Addressing the underlying autonomic dysregulation, rather than the heart rate itself, is the more effective path to recovery.
Heart rate spikes can occur during movement, not only when standing. Balance and movement require continuous integration of several neurologic systems:
These systems communicate through brainstem integration networks. After concussion, this integration may become unstable — producing a sensory mismatch in which the brain receives conflicting signals about body position and movement.[5] When the brainstem detects this conflict, it may activate the sympathetic nervous system in an attempt to stabilize the system. This sympathetic response can increase heart rate.
This is why patients may notice heart rate spikes or symptom flares when:
In these situations, the heart is responding to neurologic integration stress — not a primary cardiovascular problem. This distinction matters for how recovery is approached.
Autonomic symptoms after concussion can vary in severity and may fluctuate during recovery. Common symptoms include:
Symptom severity often fluctuates day to day. Factors such as hydration, sleep quality, physical demand, and sensory environment can all influence how pronounced autonomic symptoms are on a given day. This variability is a characteristic feature of autonomic dysregulation after concussion.
Autonomic symptoms do not always appear immediately after a concussion. They may develop days or weeks after injury as the brain's metabolic and regulatory systems respond to the disruption caused by the impact.[6]
This delayed onset is common and does not indicate a new injury. It reflects the progressive nature of the neurometabolic cascade — the period of reduced metabolic efficiency that follows concussion. As the brain attempts to compensate for disrupted networks, autonomic regulation may become increasingly unstable before it begins to recover.
If heart rate symptoms, dizziness, or exercise intolerance develop in the days or weeks following a concussion, this is a recognized pattern — not a sign that something new has gone wrong.
Autonomic regulation affects more than heart rate. It governs cerebral circulation — the delivery of blood and oxygen to the brain — as well as energy regulation, heart rate variability, and exercise tolerance. When these systems are unstable, the brain operates under a sustained metabolic burden.[7]
This is why autonomic dysregulation often contributes to a broader pattern of persistent concussion symptoms — including fatigue, brain fog, dizziness, and headache — rather than producing only cardiovascular symptoms. The brain's reduced capacity to regulate its own circulation affects cognitive function, sensory processing, and physical tolerance simultaneously.
Autonomic dysregulation is frequently one component of persistent concussion symptoms, often occurring alongside vestibular dysfunction, visual-vestibular mismatch, or cerebellar coordination disruption. Identifying which system is the primary driver — and which are secondary — is central to effective recovery planning. For a deeper explanation of how these systems interact, see our article on why post-concussion symptoms persist.
The autonomic nervous system does not operate in isolation. It is continuously influenced by brain networks responsible for balance, sensory integration, and coordination — particularly the vestibular system, visual processing networks, and cerebellar circuits. When one of these systems becomes disrupted after concussion, it can create a neurologic constraint that destabilizes circulation regulation.
In some patients, vestibular dysfunction, visual-vestibular mismatch, or cerebellar coordination disruption may be the primary driver of autonomic symptoms. The autonomic instability is a downstream consequence of the neurologic constraint — not the root cause. This is why treating autonomic symptoms in isolation, without identifying the underlying constraint, often produces incomplete or temporary improvement.
In many cases, rapid heart rate is not the primary problem. It is a signal that the brain is attempting to stabilize a system that has lost its normal coordination.
Understanding this distinction changes how recovery is approached. Rather than managing the heart rate response directly, effective rehabilitation identifies the neurologic constraint — whether vestibular, visual, cerebellar, or autonomic — and addresses that system first. For a comprehensive explanation of how these constraints interact, see our Autonomic Nervous System Flow After Concussion article.
Neurologic evaluation is recommended if you experience any of the following after a concussion:
Early evaluation identifies which neurologic system is driving the autonomic symptoms and allows targeted rehabilitation to begin. Learn more about what evaluation involves on our Post-Concussion Syndrome page or on our What to Expect at Your First Visit page.
Evaluation at Pittsford Performance Care uses a constraint-based model that systematically assesses the neurologic systems most commonly involved in post-concussion autonomic dysfunction — including vestibular function, visual tracking, autonomic regulation, and cerebellar coordination. Rather than treating autonomic symptoms in isolation, the evaluation identifies the primary neurologic constraint: the system most responsible for driving the current pattern of symptoms.
Autonomic symptoms after concussion often reflect disruption of brain networks responsible for regulating circulation and energy. Identifying the primary neurologic constraint helps guide recovery. For a comprehensive overview of this approach, see our Persistent Concussion Guide or our article on how long post-concussion syndrome lasts.
Yes. Concussion can disrupt the brainstem networks responsible for autonomic regulation — the systems that control heart rate, blood pressure, and circulation. When these networks become dysregulated, some patients develop postural orthostatic tachycardia syndrome (POTS), characterized by an abnormal heart rate increase when moving to an upright position.
When you stand, gravity pulls blood toward the lower body. The brainstem normally coordinates a rapid circulatory adjustment — tightening blood vessels and stabilizing blood pressure — to maintain blood flow to the brain. After concussion, this response can become delayed or inefficient. The heart compensates by beating faster, producing the heart rate spike you notice when standing.
Yes. Concussion can disrupt the autonomic nervous system, which regulates heart rate. Patients may experience rapid heart rate when standing (orthostatic tachycardia), during movement, or in visually complex environments. In many cases, the elevated heart rate is a compensatory response to neurologic integration stress rather than a primary heart problem.
Duration varies depending on which neurologic systems were disrupted and whether targeted rehabilitation has been applied. Some patients recover within weeks; others experience symptoms for months or longer. Autonomic symptoms that persist beyond 4 weeks warrant neurologic evaluation to identify the underlying constraint and guide recovery.
Post-concussion POTS is rarely permanent. Persistent autonomic symptoms typically reflect ongoing neurologic system disruption rather than irreversible injury. When the primary neurologic constraint driving the autonomic instability is identified and addressed through targeted rehabilitation, most patients experience meaningful improvement.
Exercise that exceeds the autonomic system's current tolerance can temporarily worsen symptoms. However, carefully graded aerobic exercise — calibrated to stay below the symptom threshold — is often a component of autonomic rehabilitation. The goal is to progressively restore exercise tolerance without triggering symptom flares.
Dysautonomia is a broader term describing any dysfunction of the autonomic nervous system. POTS is a specific form of dysautonomia characterized by an abnormal heart rate increase of 30 or more beats per minute when moving from lying to standing. After concussion, patients may experience POTS specifically, or broader autonomic dysregulation that does not meet the full POTS diagnostic criteria.
For a comprehensive overview of persistent concussion and the neurologic systems involved, see our Persistent Concussion Guide.
To understand the mechanisms behind symptom persistence in more depth, see Why Post-Concussion Symptoms Persist.
If dizziness is among your symptoms, see Why Dizziness Happens After a Concussion for an explanation of the vestibular and visual systems involved.
A neurologic evaluation at Pittsford Performance Care identifies the primary constraint driving your autonomic symptoms — and builds a care plan around restoring that system first.
Supporting literature for this article. View full Works Cited
Leddy, J. J., Kozlowski, K., Donnelly, J. P., Pendergast, D. R., Epstein, L. H., & Willer, B. (2010). A preliminary study of subsymptom threshold exercise training for refractory post-concussion syndrome. Clinical Journal of Sport Medicine, 20(1), 21–27. https://doi.org/10.1097/JSM.0b013e3181c6c22c
This landmark study demonstrated that graded aerobic exercise below symptom threshold accelerated recovery in athletes with persistent post-concussion syndrome. It directly supports the PPC approach of using exercise as an active therapeutic tool rather than prescribing rest until symptom resolution.
Baguley, I. J., Heriseanu, R. E., Nott, M. T., Chapman, J., & Sandanam, J. (2008). Dysautonomia after severe traumatic brain injury: Evidence of persisting sympathetic and parasympathetic dysfunction. Journal of Neurology, Neurosurgery & Psychiatry, 79(11), 1237–1243. https://doi.org/10.1136/jnnp.2007.132142
This study documented persistent sympathetic and parasympathetic dysfunction in TBI survivors, including elevated heart rate, blood pressure lability, and sweating abnormalities. It establishes the neurobiological basis for the autonomic symptoms PPC tracks in its outcome registry.
Leddy, J. J., Baker, J. G., Kozlowski, K., Bisson, L., & Willer, B. (2012). Reliability of a graded exercise test for assessing recovery from concussion. Clinical Journal of Sport Medicine, 22(5), 381–386. https://doi.org/10.1097/JSM.0b013e3182639f22
This study validated the Buffalo Concussion Treadmill Test (BCTT) as a reliable measure of autonomic exercise tolerance after concussion. The BCTT is a key tool in PPC's autonomic assessment battery, allowing clinicians to identify exercise intolerance and set individualized sub-threshold training targets.
Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology. (1996). Heart rate variability: Standards of measurement, physiological interpretation, and clinical use. Circulation, 93(5), 1043–1065. https://doi.org/10.1161/01.CIR.93.5.1043
This foundational consensus paper established the standards for measuring and interpreting heart rate variability (HRV) as a non-invasive window into autonomic nervous system balance. PPC uses HRV-informed metrics to monitor autonomic recovery and guide training load decisions throughout the episode of care.
Kontos, A. P., Elbin, R. J., Schatz, P., Covassin, T., Henry, L., Pardini, J., & Collins, M. W. (2012). A revised factor structure for the Post-Concussion Symptom Scale: Baseline and postconcussion factors. American Journal of Sports Medicine, 40(10), 2375–2384. https://doi.org/10.1177/0363546512455400
This factor analysis of the Post-Concussion Symptom Scale identified distinct symptom clusters including cognitive-fatigue, sleep, affective, and somatic domains. The cerebellar-related somatic cluster (balance, dizziness, coordination) aligns with PPC's domain-specific evaluation approach and supports the use of targeted cerebellar rehabilitation.
Giza, C. C., & Hovda, D. A. (2014). The new neurometabolic cascade of concussion. Neurosurgery, 75(Suppl 4), S24–S33. https://doi.org/10.1227/NEU.0000000000000505
This review describes the ionic flux, neurotransmitter disruption, and metabolic crisis that follow concussion at the cellular level. Understanding this cascade informs PPC's phased approach to loading and recovery, particularly the rationale for avoiding excessive cognitive and physical demand during the acute metabolic window.
McCrea, M., Guskiewicz, K., Randolph, C., Barr, W. B., Hammeke, T. A., Marshall, S. W., … & Kelly, J. P. (2013). Incidence, clinical course, and predictors of prolonged recovery time following sport-related concussion in high school and college athletes. Journal of the International Neuropsychological Society, 19(1), 22–33. https://doi.org/10.1017/S1355617712000872
This prospective cohort study tracked recovery trajectories in student athletes and identified predictors of prolonged recovery, including prior concussion history and symptom burden at presentation. The findings support PPC's emphasis on individualized, trajectory-based care rather than time-based return-to-play protocols.