Vident Partners provides vetted stroke and vascular neurology expert witnesses for cases involving missed or delayed stroke diagnosis, failure to administer thrombolytics within the treatment window, delayed transfer for mechanical thrombectomy, misread head CT and CT angiography, and post-stroke anticoagulation errors. Request a referral today.
Find a Stroke & Vascular Neurology Expert →Overview
Stroke litigation is unlike most medical negligence litigation because liability is measured in minutes. Ischemic stroke accounts for approximately 87% of all strokes 1, and the reperfusion therapies that change outcomes — intravenous thrombolysis and endovascular thrombectomy — are governed by hard time windows written into national guidelines and hospital protocols. When an emergency department, a hospitalist service, or an urgent care clinic fails to recognize a stroke, or recognizes it too late to treat, the resulting deficit is often permanent and the damages substantial. Stroke and vascular neurology experts reconstruct the clock: what the patient reported, when, to whom, what was documented, what imaging was obtained, and whether the treatment that was available was offered.
Because acute stroke care is protocol-driven, the applicable standard is unusually concrete and unusually well documented. Experts in this field routinely testify to the following benchmarks:
These numbers matter in litigation because they convert a soft "reasonable physician" inquiry into a documented timeline that a jury can follow. A triage note timed at 14:12, a CT order at 15:40, and a neurology consult at 17:05 tell a story that requires an expert only to interpret, not to construct.
The recurring failure modes are narrower than attorneys often expect. Posterior circulation strokes present with dizziness, nausea, and gait instability rather than the facial droop and unilateral weakness that triage protocols are built to catch, and are disproportionately represented in missed-diagnosis claims. Transient ischemic attack is discharged as resolved rather than worked up as a warning event, and the completed stroke follows within days 1. Last-known-well time is recorded imprecisely or not at all, foreclosing thrombolysis that would otherwise have been available. Community hospitals without endovascular capability delay transfer to a comprehensive stroke center past the thrombectomy window. And in hemorrhagic cases, anticoagulation is continued, restarted, or dosed without regard to imaging findings.
Vascular neurology is a formally recognized subspecialty. The American Board of Psychiatry and Neurology requires that applicants already hold ABPN certification in neurology or in neurology with special qualification in child neurology, and that they complete one year of ACGME-accredited fellowship training in vascular neurology begun only after general residency is finished 3. That credential is the appropriate benchmark where the disputed conduct is neurologic decision-making. Where the disputed conduct is triage, imaging interpretation, or the decision to transfer, the better-matched expert may instead be an emergency physician, a neuroradiologist, or a hospitalist — and defense counsel will move to exclude a witness whose specialty does not align with the actor whose conduct is at issue.
Causation in stroke cases turns on whether timely treatment would more likely than not have produced a materially better outcome — a question that depends on occlusion location, collateral circulation, core infarct volume, and the patient's baseline. Prevention-side claims raise a different set of questions: hypertension is an identified risk factor in up to 90% of all strokes, and as much as 40% of strokes are estimated to be preventable through adequate blood pressure control 4. Atrial fibrillation accounts for roughly one in six strokes and carries about a 1.9% annual stroke risk untreated 4, making failure to anticoagulate a frequent theory of liability. For symptomatic internal carotid artery stenosis exceeding 70%, intervention is beneficial within two weeks of the index stroke or TIA 4. Because stroke is the No. 4 cause of death and a leading cause of long-term disability in the United States 5, damages models in these cases routinely require a life care planner and a vocational expert alongside the neurologist.
Noncontrast head CT is recommended within 20 minutes of presentation, intravenous thrombolysis within 4.5 hours of last-known-well for selected candidates, and a door-to-needle time of 60 minutes is the accepted target — benchmarks that convert the stroke standard of care into a documented timeline.
Case Types
Missed or delayed stroke diagnosis in the emergency department, including posterior circulation strokes presenting as dizziness or vertigo
Failure to administer intravenous thrombolysis within the 4.5-hour window, or failure to document last-known-well time
Delayed transfer to a comprehensive stroke center resulting in a missed mechanical thrombectomy window
Discharge of a transient ischemic attack without workup, followed by completed stroke
Failure to anticoagulate a patient with atrial fibrillation, or anticoagulation errors in hemorrhagic stroke
Failure to evaluate or treat symptomatic carotid stenosis before a disabling stroke
Misinterpretation of head CT, CT angiography, or MRI in the acute stroke setting
Qualifications
Related Specialties
FAQ
Where the disputed conduct is neurologic judgment, the strongest expert is board certified in neurology by the ABPN with subspecialty certification in vascular neurology, which requires a one-year ACGME-accredited fellowship completed after general neurology residency. Active participation on a hospital stroke team or telestroke service is important, because the case will turn on real-world protocol execution rather than textbook knowledge.
Often both. The expert must match the actor whose conduct is challenged. If the allegation is that triage and the emergency physician failed to recognize stroke symptoms or order timely imaging, an emergency medicine expert speaks to that standard. If the allegation is that the neurologist wrongly excluded the patient from thrombolysis or failed to arrange transfer for thrombectomy, a vascular neurologist is required. Cases alleging a misread CT or CTA also require a neuroradiologist.
Intravenous thrombolysis is recommended within 4.5 hours of last-known-well time for selected candidates. Mechanical thrombectomy for large vessel occlusion is indicated within 6 hours, and extends to roughly 16 hours — and in selected patients beyond that — when advanced perfusion imaging supports it. Because these windows run from the last time the patient was known to be well, disputes over that timestamp are frequently the central factual issue in the case.
Posterior circulation strokes commonly present with dizziness, nausea, imbalance, or visual disturbance rather than the facial droop, arm weakness, and speech difficulty that public education campaigns and triage screening tools are designed to detect. Standard noncontrast CT is also comparatively insensitive to early posterior fossa ischemia. These cases frequently involve a patient discharged with a diagnosis of vertigo, labyrinthitis, or migraine who returns with a completed brainstem or cerebellar infarct.
The expert must establish that the patient met the eligibility criteria at the relevant time, that the therapy was available, and that administering it more likely than not would have produced a materially better neurologic outcome. That analysis draws on the occlusion site, collateral circulation, infarct core volume on imaging, the NIH Stroke Scale score, and published outcome data for comparable patients. Defense experts commonly contest eligibility rather than the standard itself.
In general, medical expert fees are determined by the expert themselves, based on a variety of criteria. Among those criteria are clinical experience, forensic experience, academic qualifications such as Fellowships, clinical settings, and publications. Vident does have some influence over expert fees by comparing experts within a specialty, but ultimately it is a personal decision by the expert.
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