Missed Stroke in the ER: When “Migraine” or “Vertigo” Is the Wrong Call

If an emergency room said the problem was a migraine, vertigo, anxiety, or “just dizziness,” but the patient later learned it was a stroke, the question families usually ask is direct: should the ER have caught it sooner?

Sometimes the answer is no. Stroke can be difficult to diagnose, symptoms can change, and not every patient qualifies for every stroke treatment. A bad outcome or a later diagnosis does not automatically mean an Oregon malpractice case exists.

But sometimes the records raise serious questions. Stroke warning signs can include balance loss, dizziness, vision changes, speech trouble, one-sided weakness or numbness, confusion, and a sudden severe headache. A normal CT does not reliably rule out early ischemic stroke, especially in some posterior-circulation or dizziness/vertigo presentations. Early MRI can also miss some posterior fossa strokes. In a possible malpractice review, the important questions are what the ER team knew, what the symptom pattern suggested, what testing or consultation was indicated, and whether an earlier stroke diagnosis probably would have changed the outcome.

This article is educational information for Oregon patients and families. It is not medical advice or legal advice for any specific case. If someone is having current or recurring stroke symptoms, call 9-1-1 or seek emergency medical care immediately.

For related missed-emergency issues, compare delayed brain bleed after ER discharge, imaging and monitoring breakdowns after trauma, acute compartment syndrome, and cauda equina syndrome. The medicine is different, but the record-review questions often have a common theme: timing, red flags, reassessment, and causation.

If Someone Is Having Stroke Symptoms Now, Call 9-1-1

Stroke symptoms are an emergency. The CDC lists stroke warning signs that include sudden numbness or weakness, especially on one side of the body; sudden confusion or trouble speaking; sudden trouble seeing; sudden trouble walking, dizziness, loss of balance, or lack of coordination; and a sudden severe headache with no known cause.

The CDC’s B.E. F.A.S.T. framework is a useful way to remember that stroke is not limited to facial droop or arm weakness:

B — Balance: sudden loss of balance, dizziness, or trouble walking
E — Eyes: sudden vision changes
F — Face: facial drooping
A — Arms: arm weakness
S — Speech: speech difficulty
T — Time: time to call 9-1-1

Stroke treatment is time-sensitive. The CDC states that stroke treatments work best when stroke is recognized and diagnosed quickly. Clinical guidelines also recognize selected treatment windows beyond the first few hours for some patients, but eligibility depends on the type of stroke, imaging, last-known-well time, contraindications, and specialist judgment. The immediate safety rule is simple: do not wait at home to see whether possible stroke symptoms improve.

Why Stroke Is Sometimes Mistaken for Migraine, Vertigo, or Benign Dizziness

Some strokes look like the dramatic examples people know from public health campaigns: face droop, one-sided arm weakness, and slurred speech. Others are less obvious. A patient may come to the ER with dizziness, vertigo, vomiting, balance trouble, a severe headache, double vision, trouble walking, or symptoms that come and go.

Those symptoms can overlap with non-stroke conditions, including vestibular disorders and migraine. That overlap is one reason the legal analysis must be careful. A diagnosis of migraine or vertigo is not automatically negligent. The question is whether the overall presentation should have prompted a more urgent stroke or central-neurologic evaluation.

Medical literature recognizes the risk. A peer-reviewed review in Stroke reported that dizziness and vertigo account for an estimated 4.4 million U.S. emergency department visits each year, and stroke is the underlying cause in about 3% to 5% of those visits. The same review states that dizziness and vertigo are among the symptoms most tightly linked to missed stroke, and it estimates that nearly 10% of strokes are misdiagnosed at first medical contact. Those are population-level findings, not proof of negligence in any individual case, but they explain why “the ER called it vertigo” may deserve closer review when the outcome is serious.

Record Details That Can Make a Missed-Stroke Review More Serious

Families reviewing what happened should pay close attention to whether the records describe symptoms such as:

sudden onset dizziness, vertigo, imbalance, or inability to walk normally;
one-sided weakness, numbness, facial droop, or clumsiness;
slurred speech, word-finding difficulty, confusion, or trouble understanding speech;
sudden vision loss, double vision, or other eye/vision changes;
a severe new headache, especially if unlike prior headaches;
repeated vomiting with neurologic symptoms;
nystagmus, severe gait instability, or truncal instability;
neck pain or other concerns that might suggest vascular injury in the right context;
atrial fibrillation, anticoagulant use, recent pregnancy/postpartum status, or other high-risk history; or
transient episodes that improved before the clinician examined the patient.

None of these facts proves that the ER committed malpractice. They are record-review issues. The more the presentation included sudden neurologic symptoms, balance or eye findings, inability to walk, high-risk history, or repeated transient events, the more important it becomes to ask whether the ER treated the case as a possible stroke or TIA rather than a routine migraine or benign inner-ear problem.

Why “The Exam Was Normal” May Not Be the Whole Story

Families are often told, “The neurologic exam was normal.” Sometimes that is important. But it may not answer the entire question.

AHRQ PSNet, in a patient-safety commentary on missed stroke after dizziness and headache, notes that in a patient with TIA, the neurologic examination is typically normal or baseline between episodes. In other words, a normal exam after symptoms have resolved may support the possibility of a transient ischemic attack rather than exclude it.

The timing matters. If the patient had trouble speaking at home, could not walk straight in triage, or had vision changes that later improved, the fact that a later bedside exam looked better may not erase the earlier red flags. A malpractice review usually needs the full timeline, not just the final diagnosis listed on the discharge paperwork.

The Diagnostic Issue: Timing and Triggers Often Matter More Than the Word “Vertigo”

Patients use words like “dizzy,” “vertigo,” “lightheaded,” and “off balance” in different ways. Patient-safety literature describes a diagnostic approach that looks beyond the label the patient uses. The Stroke review on acute dizziness and vertigo emphasizes timing and triggers, targeted bedside examinations, and MRI when needed, rather than relying on whether a patient uses the word “vertigo” instead of “lightheadedness.” AHRQ PSNet likewise describes a timing-and-triggers approach as more consistent with the evidence than the older symptom-quality approach.

For example, a triggered spinning sensation only with certain head positions may point clinicians in one direction. Sudden continuous vertigo with vomiting, inability to walk, new neurologic symptoms, or concerning eye findings may require a different analysis. Intermittent episodes of dizziness plus speech, vision, weakness, or gait symptoms may raise TIA concerns even if the patient looks better between episodes.

That is why records matter. The words in triage, nursing notes, physician notes, EMS documentation, family reports, and discharge instructions may tell different parts of the story.

HINTS and HINTS-Plus: Useful, But Easy to Overstate

Some families encounter the term HINTS or HINTS-plus while researching missed stroke after vertigo. HINTS is a bedside eye-movement examination used in certain acute vestibular presentations to help distinguish central causes, such as stroke, from peripheral vestibular causes.

It can be powerful in the right setting. A 2023 peer-reviewed review reported high pooled diagnostic accuracy for HINTS and HINTS-plus in acute vestibular syndrome when performed by trained examiners. But the limitations are important. HINTS is not a general screening test for every dizzy patient. The Stroke review cautions that HINTS applies only to specific symptomatic patients with acute vestibular syndrome or spontaneous episodic vestibular syndrome while acutely symptomatic, including spontaneous or gaze-evoked nystagmus. The 2023 review also notes that these bedside tests require training.

So HINTS may matter in a record review, but it is not a shortcut. The questions are whether the patient was the right kind of patient for the test, whether the examiner was trained, whether the findings were documented accurately, and whether the rest of the presentation still called for imaging, neurology consultation, transfer, or reassessment.

Why a “Normal CT” or Early Negative MRI May Not End the Stroke Question

One of the most common things families hear after a missed stroke is: “The scan was normal.” That may be true and still not fully answer whether the ER response was reasonable.

Non-contrast CT can be appropriate and important in acute stroke pathways, including to help evaluate for hemorrhage. The problem is when a normal CT is treated as if it rules out early ischemic stroke or posterior circulation stroke in a patient whose clinical picture remains concerning.

The Stroke review reported CT sensitivity of only 7% to 16% for acute ischemic stroke in acute dizziness/vertigo settings and described CT as of little use for identifying acute ischemic strokes, particularly in the posterior fossa. AHRQ PSNet similarly notes that non-contrast CT has extremely poor sensitivity for TIA or early ischemic stroke, especially in patients presenting with dizziness.

MRI with diffusion-weighted imaging is often more sensitive for ischemic stroke, but it is not perfect early. The same Stroke review states that early MRI-DWI can miss approximately 15% to 20% of acute posterior fossa infarctions within 24 to 48 hours of symptom onset.

What CT Can and Cannot Prove

A normal CT may help show that there is no obvious acute hemorrhage or large established infarct at that moment. It may be part of an appropriate stroke evaluation. It does not necessarily prove that the patient was not having an ischemic stroke, TIA, posterior circulation event, or evolving process that required further assessment.

In a malpractice review, the question is usually not “Was a CT done?” The better questions are:

What symptoms and neurologic findings were present before the CT?
Did the order or clinical history alert radiology to stroke, posterior circulation ischemia, dissection, or other specific concerns?
Were CT angiography, MRI/MRA, repeat imaging, neurology consultation, or transfer considered?
Did clinicians reassess the patient after imaging?
Were discharge instructions and return precautions appropriate for unresolved neurologic red flags?

When Additional Imaging or Reassessment May Matter

There is no single imaging rule that applies to every patient. Some patients may need urgent CT angiography, MRI/MRA, repeat imaging, serial neurologic exams, specialist consultation, or transfer to a stroke-capable facility. Others may not. The answer depends on symptom timing, stroke type, neurologic findings, vascular risk, last-known-well time, the hospital’s capabilities, and the clinical judgment required under the circumstances.

The key point for families is that “normal CT” or “negative early MRI” should be read in context. If the patient still could not walk, had ongoing double vision, had repeated transient speech problems, or had other central-neurologic red flags, the records should explain why stroke was ruled out, why discharge was safe, or why further testing was not needed.

The ER Timeline That Can Decide a Missed-Stroke Case

Missed-stroke cases often turn on timing. Stroke care is built around time: symptom onset, last-known-well, arrival, triage, imaging, stroke-code activation, specialist review, treatment decisions, and transfer decisions.

AHA/ASA acute ischemic stroke guidelines describe IV alteplase as time-sensitive for selected patients. They recommend IV alteplase for selected acute ischemic stroke patients who can be treated within 3 hours of symptom onset or last-known-well/baseline state, and also for selected patients treatable between 3 and 4.5 hours. For selected patients with large vessel occlusion in the anterior circulation, the guidelines recommend mechanical thrombectomy within 6 to 16 hours of last-known-normal when DAWN or DEFUSE 3 eligibility criteria are met, and state that thrombectomy is reasonable within 16 to 24 hours when DAWN criteria are met.

Those are not guarantees. Many patients do not qualify because of stroke type, bleeding risk, imaging findings, contraindications, late presentation, infarct size, or other clinical factors. But the windows show why delay matters. If a patient arrived within a possible treatment window and the stroke evaluation was delayed because symptoms were dismissed as migraine or vertigo, causation becomes a major expert-review issue.

Key Times Families Should Look for in the Records

When requesting records, families should try to preserve and organize the timeline. Important times may include:

when the patient was last known well;
when symptoms first began;
when EMS was called and what EMS documented;
ER arrival time;
triage time and triage complaints;
first nursing and provider assessments;
documented neurologic exams or stroke scale scores;
when a stroke code was activated, if at all;
when imaging was ordered, performed, read, and communicated;
when neurology, telestroke, radiology, or transfer discussions occurred;
medication decision times;
discharge time and discharge diagnosis;
return-visit times if the patient came back worse; and
later diagnosis, transfer, thrombectomy, ICU, rehab, or follow-up records.

This is also where a practical records tool can help. Johnson Law’s medical documentation checklist may be useful for families trying to organize ER records, imaging reports, follow-up records, and billing or loss documentation.

Treatment-Window Questions Are Case-Specific

The legal question is not simply whether the ER could have diagnosed stroke earlier. It is whether an earlier diagnosis probably would have changed what happened.

That may involve questions such as:

Would the patient have been eligible for IV thrombolysis if stroke had been recognized sooner?
Would earlier CT angiography or transfer have identified a large vessel occlusion in time for thrombectomy review?
Would earlier antiplatelet therapy, anticoagulation planning, monitoring, or specialist involvement have reduced risk, depending on stroke type and contraindications?
Did a delay cause a lost treatment opportunity, larger infarct, avoidable swelling, worse disability, or death?

These are medical causation questions. Population-level data show that faster treatment is associated with better outcomes in stroke systems of care, but no article can say that a specific patient would have recovered if the ER acted sooner. Qualified experts usually need to review the records, imaging, timing, and outcome.

When a Missed Stroke May Become an Oregon Malpractice Case

An Oregon medical malpractice claim generally requires more than proving that the diagnosis was wrong. The core issues are standard of care, breach, causation, and damages.

For broader background, see Johnson Law’s Oregon medical malpractice review page. In a missed-stroke case, the analysis is usually more specific: what would an ordinarily careful emergency physician or hospital team have done with this symptom pattern, at this time, in this setting?

Standard of Care: What Should an Ordinarily Careful Oregon Physician Have Done?

ORS 677.095 provides that a physician licensed by the Oregon Medical Board has a duty to use the degree of care, skill, and diligence used by ordinarily careful physicians in the same or similar circumstances in the physician’s community or a similar community.

Clinical guidelines, hospital stroke protocols, AHA/ASA guidance, emergency medicine dizziness guidelines, and patient-safety literature may inform expert review. They do not automatically decide liability in an Oregon case. Hospital, nursing, radiology, transfer, or entity-liability theories may require additional analysis and expert opinions.

Breach: Examples of Issues an Expert May Review

Depending on the facts, an expert may review whether the ER team:

recognized B.E. F.A.S.T. symptoms, including balance and vision changes;
considered central causes when dizziness or vertigo occurred with neurologic symptoms;
used an appropriate timing-and-triggers approach rather than relying only on the word “vertigo”;
documented gait, eye findings, focal deficits, and neurologic reassessments;
used HINTS/HINTS-plus only when appropriate and documented it reliably;
understood the limits of CT or early MRI in the relevant presentation;
ordered appropriate vascular imaging or repeat imaging when indicated;
involved neurology, telestroke, radiology, or transfer resources in time;
activated a stroke pathway when the presentation warranted it;
discharged the patient despite unresolved red flags; or
gave return precautions that matched the risk.

This list is not a checklist for liability. It is a way to identify record-based questions that may matter in a careful review.

Causation: Did the Delay Probably Change the Outcome?

Causation is often the hardest part of a missed-stroke case. Even if a diagnosis should have been made sooner, the case still requires proof that the delay probably caused additional harm.

That may mean showing that earlier recognition would likely have led to treatment eligibility, faster transfer, closer monitoring, or other management that probably reduced the severity of injury. It may also require addressing difficult defense arguments: the stroke was already complete, the patient was outside treatment windows, the patient had contraindications, the stroke would have progressed anyway, or the same outcome would have occurred even with earlier diagnosis.

The answer usually depends on neurology, emergency medicine, neuroradiology, life-care, and economic review.

Damages: The Outcome Must Be Documented

Stroke injuries can affect mobility, speech, swallowing, cognition, vision, independence, employment, and family life. Oregon law distinguishes economic and noneconomic damages. ORS 31.705 defines economic damages to include objectively verifiable monetary losses such as medical expenses and lost income, while noneconomic damages include nonmonetary harms such as pain, mental suffering, emotional distress, and loss of companionship and society.

In a missed-stroke case, damages documentation may include hospital and rehab records, therapy needs, home modifications, attendant care, lost earning capacity, communication or cognitive impairment, pain and suffering, and family impacts. The value and proof of those losses are case-specific.

Special Oregon Issues Families Should Not Overlook

Oregon-specific rules can affect timing, process, parties, and damages. Families should not wait to ask about these issues, especially when the patient’s disability is severe or the hospital may be a public entity.

Deadlines and Tolling Can Be Fact-Specific

ORS 12.110(4) generally provides that a medical-injury action arising from medical, surgical, or dental treatment, omission, or operation must be started within two years from when the injury is first discovered or should have been discovered with reasonable care, and no later than five years from the treatment, omission, or operation, except for fraud, deceit, or misleading representation.

That sentence is not enough to calculate a real deadline. Discovery, tolling, adverse health care incident processes, public-body notice rules, federal/VA facilities, tribal facilities, OHSU-related entities, minors, incapacity, and wrongful-death issues can change the analysis. If a potential claim exists, deadline review should happen promptly.

Oregon also has health care dispute-resolution and adverse health care incident statutes. ORS 31.250 generally requires parties and attorneys in certain health care negligence actions to participate in some form of dispute resolution within 270 days after filing unless the case resolves or the parties waive dispute resolution in writing. ORS 31.260 to 31.278 provide an adverse health care incident process involving notice, discussion, mediation, and tolling rules when that process is used. These process rules should not be confused with proof that malpractice occurred.

If the Missed Stroke Was Fatal

If the patient died, Oregon’s wrongful death statute may become relevant. ORS 30.020 allows the personal representative to bring an action when death is caused by another’s wrongful act or omission if the decedent could have maintained an injury action had the decedent lived. The statute identifies categories that can include medical, hospital, nursing, burial, and memorial charges; pre-death disability, pain, suffering, and lost income; estate pecuniary loss; and family pecuniary loss and loss of society, companionship, and services.

Wrongful death timing, proper parties, personal representative issues, and damages proof require separate review.

If Someone Apologized

Families sometimes remember that a doctor, nurse, or hospital representative apologized. That may be important emotionally, and it may lead to useful questions. But an apology alone is not proof of negligence. ORS 677.082 generally protects certain expressions of regret or apology by Oregon Medical Board licensees and covered health care institutions or facilities as non-admissions of liability and limits their use in civil or administrative proceedings.

The records, expert review, timing, and causation evidence matter more than the fact of an apology by itself.

What to Gather Before Asking for a Malpractice Review

The strongest first step is often records preservation. Families should request and keep complete copies of:

EMS records and run sheets;
complete ER records, including triage, nursing notes, physician notes, orders, medication records, and discharge instructions;
neurologic assessment and stroke scale documentation;
imaging reports and, when possible, the actual CT, CTA, MRI, MRA, or other image files;
radiology communications or addenda;
lab results and vital signs;
transfer-center, telestroke, neurology, or specialist notes;
admission, ICU, thrombectomy, stroke-unit, rehab, and follow-up neurology records;
return-visit records if the patient was discharged and came back worse;
pharmacy records and medication lists;
work-loss, disability, therapy, home-care, and life-care documentation; and
death certificate or autopsy records if the case is fatal.

It can also help to write a dated timeline while memories are fresh: what symptoms appeared, who saw them, what was said to EMS or ER staff, when symptoms changed, and what the family was told at discharge.

Related emergency-miss cases often turn on similar record and timeline questions. For example, Johnson Law has written about delayed brain bleed after ER discharge and imaging and monitoring breakdowns after trauma. Those topics involve different medicine, but they share a practical lesson: the sequence of symptoms, reassessment, imaging, discharge, and return visits can matter as much as the final diagnosis.

How Johnson Law Evaluates Missed-Stroke Cases in Oregon

Johnson Law reviews Oregon missed-stroke cases by looking first at the records and the timeline. The goal is not to assume malpractice from a bad outcome. The goal is to determine whether the symptom pattern, ER response, imaging decisions, stroke-code timing, specialist involvement, transfer decisions, and treatment-window facts justify qualified expert review.

In serious cases, that review may involve emergency medicine, neurology, neuroradiology, rehabilitation, life-care planning, and economic analysis. The central questions are whether the applicable standard of care was breached, whether that breach probably changed the patient’s outcome, and what harms can be documented.

This article is general educational information. It does not create an attorney-client relationship and is not legal advice for your specific situation. If you are concerned that an Oregon ER missed a stroke after labeling symptoms as migraine, vertigo, or benign dizziness, consider gathering the records promptly and asking for case-specific legal review.

FAQ

Can an ER Be Liable for Saying a Stroke Was Vertigo or Migraine?

Possibly, but the wrong label alone is not enough. An Oregon malpractice case usually requires proof that the ER team failed to meet the applicable standard of care, that the failure caused a worse outcome, and that damages can be shown. Expert review of the records is usually necessary.

Does a Normal CT Rule Out Stroke in the ER?

No, not reliably for early ischemic stroke or some posterior fossa presentations. CT can still be important, especially to evaluate for hemorrhage and as part of stroke pathways. The issue is whether clinicians treated a normal CT as ruling out stroke when the clinical picture remained concerning.

What If the MRI Was Negative at First?

An early negative MRI does not always end the inquiry. Medical literature reports that early MRI with diffusion-weighted imaging can miss some acute posterior fossa infarctions within the first 24 to 48 hours. The patient’s symptoms, timing, repeat evaluation, and later imaging may all matter.

Why Does the Last-Known-Well Time Matter?

Last-known-well time helps determine whether a patient might be eligible for time-sensitive stroke treatments. AHA/ASA guidelines address IV alteplase for selected patients within 3 hours and selected patients between 3 and 4.5 hours, as well as mechanical thrombectomy windows for selected large-vessel occlusion patients. Eligibility is case-specific.

Is HINTS Proof That the ER Should Have Diagnosed a Stroke?

Not by itself. HINTS and HINTS-plus can be useful in the right acutely symptomatic patient when performed by trained clinicians, but they are not general tests for every dizzy patient. The patient’s presentation, the examiner’s training, the documented findings, and the rest of the workup all matter.

How Long Do Families Have to Bring an Oregon Missed-Stroke Malpractice Case?

Oregon medical-injury timing generally involves a two-year discovery rule and a five-year repose rule under ORS 12.110(4), but real deadlines are fact-specific. Tolling, adverse health care incident processes, public-body or federal issues, wrongful death, fraud/deceit/misleading representation, and other facts may affect the analysis. Do not rely on a blog article to calculate a deadline.

Sources

Centers for Disease Control and Prevention, “Signs and Symptoms of Stroke,” including stroke warning signs and B.E. F.A.S.T.: https://www.cdc.gov/stroke/signs-symptoms/index.html
American Heart Association/American Stroke Association, “Guidelines for the Early Management of Patients With Acute Ischemic Stroke: 2019 Update,” including selected-patient thrombolysis and thrombectomy windows and time-sensitive treatment discussion: https://www.ahajournals.org/doi/10.1161/STR.0000000000000211
Saber Tehrani et al., “Diagnosing Stroke in Acute Dizziness and Vertigo: Pitfalls and Pearls,” Stroke (2018), including dizziness/vertigo misdiagnosis risk, CT limitations, early MRI limitations, timing/triggers approach, and HINTS limitations: https://pmc.ncbi.nlm.nih.gov/articles/PMC5829023/
AHRQ PSNet, Jonathan A. Edlow, “Neurological Red Flags: A Missed Stroke after Intermittent Episodes of Dizziness and Headache,” including timing-and-triggers framing, transient neurologic episodes, and imaging cautions: https://psnet.ahrq.gov/web-mm/neurological-red-flags-missed-stroke-after-intermittent-episodes-dizziness-and-headache
Tarnutzer & Edlow, “Bedside Testing in Acute Vestibular Syndrome—Evaluating HINTS Plus and Beyond—A Critical Review,” including HINTS/HINTS-plus diagnostic accuracy when performed by trained examiners and training caveats: https://pmc.ncbi.nlm.nih.gov/articles/PMC10514811/
ORS 677.095, Oregon physician duty of care, skill, and diligence: https://www.oregonlegislature.gov/bills_laws/ors/ors677.html
ORS 12.110(4), Oregon medical-injury limitation/repose framing: https://www.oregonlegislature.gov/bills_laws/ors/ors012.html
ORS 31.250 and ORS 31.260 to 31.278, Oregon health care dispute-resolution and adverse health care incident process: https://www.oregonlegislature.gov/bills_laws/ors/ors031.html
ORS 30.020, Oregon wrongful death statute: https://www.oregonlegislature.gov/bills_laws/ors/ors030.html
ORS 31.705, Oregon economic and noneconomic damages definitions: https://www.oregonlegislature.gov/bills_laws/ors/ors031.html
ORS 677.082, Oregon apology/regret protection for covered health care statements: https://www.oregonlegislature.gov/bills_laws/ors/ors677.html