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Failure to Diagnose Stroke or Aneurysm: Medical Malpractice in Arizona

The Urgency of Stroke and Aneurysm Diagnosis

When it comes to stroke and aneurysm care, minutes matter. A stroke causes brain cells to die every minute blood flow is blocked. A ruptured aneurysm can cause catastrophic bleeding in seconds. Failure to recognize and treat these conditions immediately often results in permanent brain damage, lifelong disability, or wrongful death.

According to the Centers for Disease Control and Prevention (CDC):

  • Stroke is the fifth-leading cause of death in the United States, killing nearly 160,000 people annually.
  • About 1 in 50 Americans will develop a brain aneurysm during their lifetime, and roughly 30,000 ruptures occur each year.
  • Studies show that misdiagnosis or delayed diagnosis of stroke occurs in up to 1 in 4 emergency room visits.

These statistics highlight the devastating consequences when providers fail to act.

What Is Failure to Diagnose Stroke or Aneurysm Malpractice?

Medical malpractice occurs when a healthcare provider deviates from accepted standards of care and the patient suffers harm as a result. In cases involving stroke or aneurysm, malpractice often takes the form of:

  • Failure to recognize warning signs such as sudden weakness, slurred speech, vision loss, or severe headache.
  • Misdiagnosis as a less serious condition, such as migraine, vertigo, or anxiety.
  • Failure to order diagnostic imaging like CT scans, MRIs, or angiograms.
  • Delay in administering tPA (tissue plasminogen activator), the clot-busting drug for ischemic stroke.
  • Failure to transfer to a higher-level facility capable of neurosurgical intervention.
  • Ignoring patient history, including risk factors like hypertension, smoking, or family history of aneurysms.

When providers fail in these areas and the result is brain damage or death, families may have grounds for a malpractice lawsuit.

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Stroke Misdiagnosis: A Common and Fatal Error

Strokes are frequently misdiagnosed in emergency rooms. Symptoms like dizziness, nausea, or numbness are often written off as benign. Younger patients and women are especially at risk of being dismissed.

The National Stroke Association estimates that patients lose 1.9 million neurons per minute during an untreated stroke. Even a 30-minute delay can make the difference between recovery and lifelong paralysis.

Failure to Diagnose Stroke or Aneurysm

Aneurysm Misdiagnosis: Ignoring the “Worst Headache of My Life”

Aneurysm rupture is a neurological emergency. The classic symptom is a sudden, severe headache — often described by patients as the worst headache they’ve ever experienced. Other warning signs include nausea, vision changes, and loss of consciousness.

Too often, these complaints are dismissed as migraines or stress. Without immediate imaging and surgical intervention, aneurysm rupture is often fatal. Survivors may face severe brain damage, memory loss, or permanent disability.

The Human Cost of Delayed Diagnosis

Failure to diagnose stroke or aneurysm leads to devastating outcomes:

  • Permanent disabilities: Paralysis, speech loss, cognitive decline, vision impairment.
  • Dependence on lifelong care: Many victims require 24/7 nursing or assisted living.
  • Loss of independence: Patients unable to work, drive, or live alone.
  • Wrongful death: Families lose loved ones suddenly and unnecessarily.
  • Emotional trauma: Both patients and families endure long-term grief and suffering.

For families, these cases are especially painful because the harm was preventable with timely care.

Arizona Law on Malpractice

Under A.R.S. § 12-561 et seq., Arizona law allows patients or families to file malpractice claims for failure to diagnose conditions like stroke and aneurysm.

Who May File?

  • The patient (if living with brain damage or disability).
  • The surviving spouse, children, or parents in cases of wrongful death.

The estate’s personal representative on behalf of beneficiaries.

Damages Available

  • Medical costs: Emergency care, surgeries, rehabilitation, long-term care.
  • Lost wages and reduced earning capacity.
  • Pain and suffering, including emotional trauma.
  • Loss of quality of life.
  • Wrongful death damages in fatal cases, including funeral expenses and loss of companionship.
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Melissa Babel
16 August 2026
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Outstanding from start to finish! Brian and Jen were incredibly professional, knowledgeable and thorough. Going through an unexpected, life changing event can be scary, but they put us at ease from the moment we contacted them. Every aspect of our case was handled efficiently; and we couldn't be happier with the outcome. Thank you Brian & Jen. We are eternally grateful for your hard work!!
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Heather Ballard
9 June 2026
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Brian at Snyder and Wenner was amazing. He worked hard for as long as was needed to help us in our case even when others turned us down. He got us the best results possible and was willing to fight for us until the end.
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Alex Antilla
6 May 2026
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Spoiler alert for those fortunate enough to be unaware - being involved in an automobile accident sucks. Having an attorney like Brian Snyder by your side throughout the process was a huge relief and helped me get through this difficult chapter in my life. Brian and his team fought hard to make me whole and I could not be more pleased with the outcome. Should you find yourself in need of a solid, hard working, and professional attorney who can help you make the most of your case, look no further than Snyder & Wenner PC! Thank you for everything, Stephanie and Brian! I’ll send you a post card from Hawaii!
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Monica Reuschel
1 May 2026
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We are thankful for their help with this medical malpractice case and getting us back some monies that were spent with the two surgeries needed caused by faulty hernia mesh. Thank you
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Christine Hollingsworth
28 April 2026
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Synder and Wenner were absoltuely the BEST to work with! They were understanding and patient and just so helpful! I would recommend to anyone needing representation.
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Ricardo Leon
13 March 2026
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Brian Snyder, attorney, was the only one who took my case more than five years ago.  I could not find an attorney in the state of Texas.  I spoke to many of the attorneys and law firms throughout Texas. I told them my symptoms were swollen lymph nodes, early signs of a recurrent hernia on my left groin, and I was always in pain.  No attorney wanted to help me throughout the state of Texas.  Brian Snyder, attorney, took my case without any hesitation.  He knew right away what I was going through.  Cause of Brian Snyder, I was able to get a settlement payment for an XL mesh plug and onlay.  I truly recommend Brian Snyder if any person is experiencing a recurrent hernia or mesh problems.  I truly recommend him as an attorney to get you results.  I consider Brian Snyder very sneaky, intelligent, with a lot of experience, and a view of common sense. Brian Snyder was very patience and understanding with my case. Brian Snyder is a very bright attorney. I wholeheartedly recommend that you give him a call. I am happy with the settlement and on my way to view and relax by the ocean. Thank you, Brian Snyder, for your help.
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Pat Petruzzelli
21 January 2026
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One can't begin to convey the immense gratitude we have for David Wenner. We were fortunate to have his highly skilled counsel for our brother, Richard who was involved in a life changing accident through no fault of his own. The enormity of his immediate medical needs and placement in ICU for several months was more complicated with us living out of state. David and his paralegal Jen showed their humanity and compassion in helping us to navigate the insurance and legal issues while staying abreast of Richard's ever-changing condition. They allowed us to concentrate on his care and recovery which was a true blessing. Richard continues to make progress, and he is indebted to David for helping to ensure his care for the future. Thank you, David & Jen !
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jeff cody
25 December 2025
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Brian and his team are amazing. Not only in the work they did to get my settlement, but in how they kept me updated, and helped every step of the way. I HIGHLY recommend them, and if anything ever comes up again, Brian will be the first call I make
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David Hayes
22 October 2025
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In my mind they did a excellent job on my case. No pressure one way or the other to do it a certain way. Very happy with the outcome. A shout out to Stephanie she walked (talked) me thru all the computer steps I had to take. OUTSTANDING.
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David Hayes
21 October 2025
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Snyder&Winner, handled my case very well and satisfying conclusion I have nothing but high praise for the way they handled my case. While I'm at it a special shout out to Stephanie Park. She talked me through the computer side of all this. OUTSTANDING.

Proving Failure to Diagnose Stroke or Aneurysm

To prove malpractice, attorneys must show:

  • Duty of care: The provider owed a duty to evaluate and treat symptoms competently.
  • Breach of duty: They failed to order tests, recognize symptoms, or act quickly.
  • Causation: The delay directly caused death or permanent brain injury.
  • Damages: The patient or family suffered measurable losses.

Evidence May Include:

  • ER records and physician notes.
  • Imaging studies (or lack thereof).
  • Timing of symptom onset vs. treatment.
  • Testimony from neurology and emergency medicine experts.
  • Autopsy results in fatal cases.

For example: if a patient reported sudden severe headache and vision loss, but the ER discharged them with “migraine,” and they later died of a ruptured aneurysm, liability may be clear.

Snyder & Wenner, P.C.: Advocating for Arizona Families

At Snyder & Wenner, P.C., we know how devastating it is to lose a loved one or watch them live with permanent disability because doctors failed to diagnose a stroke or aneurysm.

For decades, our firm has represented patients and families across Arizona in complex malpractice claims. We work with neurologists, radiologists, and neurosurgeons to uncover failures, prove negligence, and demand accountability.

Who May Be Liable?

  • Emergency room doctors, for failing to recognize symptoms.
  • Primary care physicians, for ignoring risk factors or patient complaints.
  • Neurologists, for misreading imaging studies.
  • Hospitals, for systemic delays, poor communication, or inadequate staffing.

Damages Families May Recover

A Final Word on Accountability

Failure to diagnose stroke or aneurysm is one of the most devastating forms of malpractice. With quick action, many patients can recover — but when providers delay, families face permanent loss and grief.

At Snyder & Wenner, P.C., we fight for Arizona patients and families harmed by diagnostic failures. Our mission is to uncover the truth, demand accountability, and secure the resources victims need for care and stability.

Every patient deserves timely, accurate diagnosis. When negligence robs families of that chance, we are here to help.

FAQs About Stroke and Aneurysm Misdiagnosis

Are all poor outcomes malpractice?
No. Some strokes and aneurysms are unpreventable. Malpractice occurs when negligence — like ignoring classic warning signs — causes preventable harm.
If providers failed to act on symptoms or order tests, families may still have a wrongful death claim.
Generally two years from the date of injury or death, though exceptions may apply.
Yes. We represent clients in Phoenix, Tucson, and throughout Arizona.