---

Aortic Aneurysm and Aortic Dissection: Early Recognition, Risk Factors, and the Consequences of Missed Diagnosis

Aortic aneurysms and aortic dissections are often survivable when recognized early. However, because symptoms can resemble more common conditions such as heart attack, stroke, or gastrointestinal illness, delays in diagnosis sometimes occur. Established cardiovascular guidelines emphasize careful risk assessment and urgent imaging when high-risk features are present. When those steps are not taken, the consequences can be catastrophic.

Why Early Recognition Matters

The aorta is the largest and most important artery in the body. It carries freshly oxygenated blood from the heart to every organ system. When something goes wrong within this vessel — whether a gradual enlargement or a sudden tear — the situation can become life-threatening within minutes.

Importantly, many aortic aneurysms and dissections are treatable. Surgical techniques have advanced significantly. Blood pressure management protocols are well established. In many cases, early detection leads to survival and long-term stability.

However, timing is everything.

When diagnosis is delayed, mortality rises dramatically. Aortic dissection, in particular, can progress rapidly. Yet early symptoms may mimic far more common conditions such as myocardial infarction, pulmonary embolism, kidney stones, or even gastrointestinal illness. Because those diagnoses are encountered more frequently in emergency settings, the possibility of aortic catastrophe may not always be immediately considered.

For that reason, careful evaluation, recognition of risk factors, and appropriate imaging are central to patient safety.

Understanding how aneurysms and dissections develop — and how they present — provides critical context for recognizing when urgent action is required.

Understanding the Aorta

Basic Anatomy

The aorta begins at the top of the heart, rises briefly within the chest, arches, and then descends through the chest and abdomen before dividing to supply blood to the pelvis and legs.

The portion within the chest is known as the thoracic aorta.
The portion below the diaphragm is the abdominal aorta.

Because the aorta is exposed to the full force of blood leaving the heart, its structural integrity is essential. Any weakness in its wall carries serious consequences.

Aneurysm vs. Dissection

Although the terms are sometimes used interchangeably in casual conversation, aneurysm and dissection describe distinct — though related — processes.

An aortic aneurysm is a segmental dilation of the vessel wall. In medical terms, it is generally defined as a localized enlargement of at least 50 percent beyond the vessel’s normal diameter. Over time, the weakened segment may gradually expand. Many thoracic aneurysms enlarge slowly and remain asymptomatic for years. However, as size increases, so does the risk of rupture or dissection.

An aortic dissection, by contrast, involves a tear in the inner layer of the aortic wall. Blood enters the layers of the vessel and creates a false channel, separating the wall layers from one another. This process can obstruct blood flow to vital organs, compromise the heart’s function, or lead to rupture.

Dissections are classified based on location. Type A dissections involve the ascending aorta and are surgical emergencies. Type B dissections involve the descending aorta and are often managed medically at first, though they can also become life-threatening.

In either case, once the structural integrity of the aortic wall is compromised, rapid deterioration is possible.

The danger lies not only in rupture. Complications may include stroke, limb ischemia, organ failure, and sudden cardiac collapse. Even patients who survive the initial event remain at risk for progressive aortic enlargement over time.

Because these conditions can initially resemble more common illnesses, clinicians must integrate symptoms, risk factors, and imaging findings carefully. That diagnostic process begins with understanding who is at risk.

Who Is at Risk?

Aortic aneurysms and dissections do not arise randomly. In most cases, identifiable risk factors are present. Recognizing those factors is critical because they directly influence when advanced imaging is warranted.

Broadly speaking, thoracic aortic disease falls into two categories: degenerative and genetic or syndromic.

Degenerative (Age-Related) Aneurysms

Most thoracic aortic aneurysms diagnosed in patients over the age of 60 are degenerative. They often occur in association with long-standing cardiovascular risk factors.

Hypertension is among the most important contributors. Elevated blood pressure increases mechanical stress on the aortic wall and is present in a substantial majority of patients with thoracic aneurysm. Over time, that chronic stress can weaken the vessel’s structure.

Other commonly associated factors include:

• Atherosclerotic risk factors
  
• Smoking
  
• Hyperlipidemia
  
• Advancing age

Thoracic aneurysms occur most frequently in the sixth and seventh decades of life and are more common in men than in women.

Importantly, degenerative aneurysms tend to enlarge gradually. Many remain clinically silent for years before detection, often discovered incidentally during imaging performed for unrelated reasons. However, even slow enlargement carries cumulative risk.

Genetic and Connective Tissue Disorders

In younger patients, thoracic aortic disease more commonly reflects an underlying genetic predisposition.

Well-recognized connective tissue disorders include:

• Marfan syndrome
  
• Loeys-Dietz syndrome
  
• Ehlers-Danlos syndrome

These conditions affect the structural integrity of connective tissue, including the aortic wall. Patients with such disorders may develop aneurysms or dissections at much younger ages, sometimes in their 20s or 30s.

Even in the absence of a named syndrome, family history matters. A meaningful percentage of patients with thoracic aortic aneurysm report relatives with a history of aneurysm or dissection. Familial thoracic aortic disease can exist independently of well-defined syndromes.

Because these patients may appear otherwise healthy, clinicians must take family history seriously. Failure to do so can delay appropriate screening and intervention.

Bicuspid Aortic Valve

Another important risk factor is a bicuspid aortic valve, a congenital condition in which the aortic valve has two leaflets rather than three. This structural variation is associated with increased stress on the ascending aorta and a higher risk of dilation and dissection.

Patients with bicuspid valve disease often require surveillance imaging of the aorta even when valve function is stable.

Pregnancy

Pregnancy places increased hemodynamic stress on the cardiovascular system. In women with underlying connective tissue disorders or known aortic dilation, this period can carry an elevated risk. Although uncommon, aortic dissection during pregnancy is well documented and requires rapid recognition.

Cocaine and Stimulant Use

Acute elevations in blood pressure associated with cocaine or other stimulant use can precipitate aortic dissection, particularly in individuals with pre-existing structural vulnerability. While not common, this association is clinically significant and underscores the importance of obtaining a thorough history.

Why Risk Assessment Matters

Risk factors do more than predict long-term disease. They directly inform acute decision-making.

When a patient with chest or back pain also carries recognized high-risk features — such as hypertension, connective tissue disease, bicuspid valve, or family history — the threshold for advanced imaging should be lower.

Conversely, when those risk factors are not considered, early opportunities for diagnosis may be missed.

Risk assessment alone, however, is not sufficient. The next step in recognition lies in understanding how these conditions present — both in textbook form and in less obvious ways.

Symptoms: Classic — and Not So Classic — Presentations

Recognizing aortic dissection begins with understanding how it presents. While the condition is often described in dramatic terms, real-world cases are not always so straightforward.

Large international registries studying acute aortic dissection have shown that most patients experience a sudden onset of pain. In fact, abrupt onset is reported in a substantial majority of cases. The pain is frequently described as severe from the beginning rather than gradually worsening.

Chest pain is common, particularly in dissections involving the ascending aorta. Back pain is also frequent, especially in dissections affecting the descending thoracic aorta. Many patients describe the pain as sharp or stabbing. Although the word “tearing” is often repeated in textbooks, patients may use a wide range of descriptions.

Severity matters. In large observational studies, severe pain is reported in the vast majority of cases. Nevertheless, the absence of classic wording does not exclude the diagnosis.

Neurologic and Vascular Findings

Aortic dissection can affect blood flow to multiple organ systems. As a result, symptoms may extend beyond pain.

Neurologic deficits may occur if blood flow to the brain is compromised. Patients may present with:

• Sudden weakness
  
• Visual changes
  
• Difficulty speaking
  
• Altered consciousness

In some cases, syncope — sudden fainting — is the first sign.

Similarly, compromised blood flow to an extremity can produce numbness, tingling, or limb weakness. These findings may appear unrelated to chest pain unless considered together.

Importantly, pulse deficits or differences in blood pressure between arms can provide additional clues. However, such findings are not always present.

Painless and Atypical Presentations

Although severe pain is common, not all dissections follow a classic pattern.

A small but meaningful percentage of patients present without significant pain. Others may experience abdominal discomfort rather than chest symptoms. Still others may arrive with stroke-like symptoms that dominate the clinical picture.

In older adults, presentation may be particularly atypical. Mild discomfort, generalized weakness, or unexplained hypotension may obscure the underlying diagnosis.

Because of this variability, reliance on a single “classic” symptom can be misleading.

The Importance of Symptom Integration

Emergency physician Dr. Robert Rogers of the University of Maryland has written extensively about the diagnostic challenges of thoracic aortic dissection. He emphasizes that certain symptom combinations should immediately prompt consideration of this diagnosis.

These include:

• Chest pain accompanied by neurologic symptoms
  
• Chest pain with limb paresthesia
  
• Unexplained fainting
  
• Isolated abdominal pain
  
• Unexplained leg weakness, even without chest pain

One classic diagnostic error he describes is the assumption that a patient presenting with multiple symptoms must have multiple diseases. Instead, failure to integrate symptoms into a single unifying diagnosis can lead to missed dissection.

As Dr. Rogers wrote:

“There are many case reports of patients presenting with chest pain and lower extremity weakness. What is striking about these cases is the fact that the chest pain was addressed and the lower extremity symptoms were ignored — i.e., failure to integrate patient complaints. The combination of chest, back pain, and extremity weakness/paresthesias should prompt consideration of thoracic artery dissection!”

His emphasis underscores an important point: when symptoms span multiple organ systems, clinicians must step back and consider whether a single vascular process could explain them.

Overlap With More Common Diagnoses

Part of the challenge lies in the fact that aortic dissection often mimics more frequently encountered emergencies.

Chest pain may initially suggest myocardial infarction.
Shortness of breath may raise concern for pulmonary embolism.
Abdominal pain may resemble gastrointestinal illness or kidney stones.
Neurologic deficits may point toward stroke.

Because those diagnoses are statistically more common, it is understandable that they may be considered first. However, when risk factors and symptom patterns align, failure to consider aortic pathology can carry grave consequences.

Understanding how misdiagnosis occurs requires examining the diagnostic process itself.

Real-World Examples of Missed Aortic Dissection

Several well-known cases illustrate how this overlap can delay recognition.

John Ritter

Actor John Ritter died in 2003 from an undiagnosed dissection of the ascending thoracic aorta. He initially presented with severe chest pain and was treated for what was believed to be a cardiac condition. Only later was the underlying aortic dissection identified.

His family brought a medical malpractice lawsuit. Some defendants settled, and a trial against other physicians resulted in a defense verdict in 2008.

The case drew national attention because it demonstrated how closely aortic dissection can resemble more common cardiac emergencies. When chest pain is abrupt and severe — particularly in patients with recognized risk factors — dissection must remain part of the differential diagnosis.

Ritter’s death underscored a difficult reality: even in modern hospitals, with advanced imaging readily available, the condition can be missed if it is not actively suspected.

Jonathan Larson

Jonathan Larson, the writer of the Broadway musical Rent, died at age 35 from an undiagnosed thoracic aortic dissection. In the days before his death, he sought emergency medical care multiple times for severe chest pain.

He was initially diagnosed with food poisoning despite having no significant symptoms of nausea, vomiting, or diarrhea. A chest X-ray reportedly showed abnormalities, yet no connection was made to an aortic condition. He later returned with persistent chest and back pain. At one point, he was quoted as saying, “You’d better call 911. I think I am having a heart attack.”

Tragically, the underlying diagnosis was missed. Larson was later found to have had Marfan syndrome, a connective tissue disorder associated with structural weakness of the aortic wall and increased risk of dissection.

His case illustrates how anchoring on a more common diagnosis, failing to integrate symptom patterns, and overlooking underlying risk factors can delay recognition of a life-threatening vascular emergency.

These examples are not cited to assign blame, but to demonstrate how easily this condition can resemble other illnesses. Understanding that overlap is central to understanding how misdiagnosis occurs.

 

How Misdiagnosis Occurs

Despite advances in imaging and emergency medicine, aortic dissection remains one of the most frequently missed catastrophic diagnoses. The reasons are rarely dramatic. More often, they reflect the ordinary pressures of emergency decision-making.

First, symptom overlap plays a major role. Chest pain, particularly when severe, naturally raises concern for myocardial infarction. If initial electrocardiogram findings or cardiac enzyme levels suggest ischemia, attention may focus appropriately on treating a suspected heart attack. Yet dissection can coexist with coronary involvement, and standard cardiac testing does not reliably exclude aortic pathology.

Second, gastrointestinal presentations may distract from vascular causes. A patient with severe chest or upper abdominal pain but no clear cardiac findings may be diagnosed with reflux, gastritis, or even food poisoning — especially in the absence of obvious neurologic deficits. As illustrated in the case of Jonathan Larson, early diagnostic impressions can shape subsequent evaluation in ways that narrow consideration of alternative explanations.

Third, chest X-ray has significant limitations. While mediastinal widening can suggest dissection, a normal chest radiograph does not rule it out. Reliance on plain radiography alone may provide false reassurance.

Beyond these clinical overlaps lies a well-recognized cognitive phenomenon: anchoring bias. Once an initial diagnosis is entertained — such as heart attack or musculoskeletal pain — subsequent findings may be interpreted through that lens. When multiple symptoms are present, they may be compartmentalized rather than integrated.

As Dr. Rogers emphasized, failure to unify chest pain and neurologic or vascular findings under a single vascular diagnosis is a recurring pattern in missed cases.

Importantly, dissection is not common compared to other emergency diagnoses. Because it is relatively rare, clinicians may not immediately consider it. Yet rarity does not justify exclusion when high-risk features are present.

This is precisely why structured risk assessment and guideline-based imaging protocols exist.

What the Standard of Care Requires

Established cardiovascular guidelines emphasize a systematic approach to suspected acute aortic syndromes. The process begins with assessment of pretest probability.

Patients are stratified based on:

• Recognized high-risk conditions (such as connective tissue disorders or known aortic dilation)
  
• Characteristic pain features (abrupt onset, severe intensity)
  
• Physical findings (pulse deficits, neurologic abnormalities, blood pressure discrepancies)

When high-risk features are present, urgent definitive imaging is recommended. Computed tomography angiography (CTA) is the most commonly used modality in emergency settings. Transesophageal echocardiography or magnetic resonance imaging may also be appropriate depending on clinical circumstances.

The key principle is that imaging should not be delayed when suspicion is substantial.

If dissection is identified, immediate management focuses on reducing shear stress on the aortic wall. Intravenous beta blockade is typically used to control heart rate and blood pressure. For Type A dissections involving the ascending aorta, urgent surgical consultation is required, as operative repair significantly improves survival.

For patients with known aneurysms, surveillance imaging intervals and surgical thresholds are well established. Repair is generally recommended once the aorta reaches specific diameter criteria or demonstrates rapid expansion.

These recommendations are not theoretical. They reflect decades of accumulated clinical evidence and consensus.

It is important to emphasize that not every adverse outcome represents negligence. Aortic dissection can be rapidly fatal even with appropriate care. However, where recognized risk factors and symptom patterns are present, and accepted diagnostic steps are not taken, questions may arise regarding whether the standard of care was met.

Before turning to the legal implications more directly, it is helpful to examine a related condition that shares many diagnostic challenges: abdominal aortic aneurysm.

 

Abdominal Aortic Aneurysm: A Related but Distinct Threat

While thoracic aortic disease often receives more attention in discussions of dissection, the abdominal aorta presents its own significant risks.

An abdominal aortic aneurysm (AAA) develops when a weakened segment of the abdominal aorta gradually expands. Like thoracic aneurysms, many AAAs enlarge silently over time. In fact, most are discovered incidentally during imaging performed for other reasons.

The danger emerges when expansion progresses to rupture.

A ruptured abdominal aneurysm can cause sudden internal bleeding. Mortality rates following rupture remain high, even with rapid intervention. By contrast, planned repair of a known aneurysm before rupture is associated with dramatically better outcomes.

This contrast underscores the importance of early detection.

How Abdominal Aneurysm Presents

Symptoms of rupture or impending rupture may include:

• Sudden, severe abdominal pain
  
• Back pain
  
• Pain radiating to the groin, buttocks, or legs
  
• Hypotension or collapse

Unfortunately, these symptoms are not specific. Severe abdominal or flank pain may initially be attributed to kidney stones. Back pain may be dismissed as musculoskeletal strain. In some cases, the presentation may resemble gastrointestinal illness.

As with thoracic dissection, symptom overlap contributes to delayed diagnosis.

When hypotension accompanies abdominal or back pain in an older patient — particularly one with a history of smoking or vascular disease — abdominal aortic rupture must be considered urgently.

Screening and Prevention

Unlike a thoracic aneurysm, an abdominal aortic aneurysm has established screening recommendations for certain populations.

Men between the ages of 65 and 75 who have ever smoked are commonly advised to undergo one-time abdominal ultrasound screening. The test is painless, noninvasive, and highly effective in detecting aneurysms before rupture.

Family history also matters. Individuals with a close relative diagnosed with an abdominal aneurysm may benefit from screening even in the absence of other risk factors.

These preventive measures exist precisely because elective repair is far safer than emergency surgery after rupture.

Public Figures Lost to Abdominal Aortic Aneurysm

Abdominal aortic aneurysm has claimed many lives, including several well-known public figures.

• Albert Einstein died following complications of a ruptured abdominal aortic aneurysm.
• Lucille Ball also succumbed to complications related to aortic disease.
• Conway Twitty died after suffering an abdominal aortic aneurysm.

These examples are not cited to dramatize the condition, but rather to illustrate that aneurysmal disease can affect individuals across all walks of life. The condition does not discriminate based on profession, status, or visibility.

More importantly, they reinforce the reality that aneurysmal disease can progress silently until catastrophic rupture occurs.

Surveillance and Long-Term Management

For patients diagnosed with aortic aneurysm — whether thoracic or abdominal — long-term management focuses on careful monitoring and risk reduction.

Imaging follow-up intervals are guided by aneurysm size and rate of expansion. Smaller aneurysms may be monitored annually or semiannually. Larger aneurysms require more frequent evaluation. Once the aorta reaches established diameter thresholds, elective repair is generally recommended.

In thoracic disease, specific size criteria differ based on location and underlying conditions. For example, patients with connective tissue disorders may require earlier surgical intervention at smaller diameters due to elevated rupture risk.

Medical management is equally important. Blood pressure control is central to slowing progression. Beta blockers and other antihypertensive agents reduce stress on the aortic wall. Lipid management and smoking cessation further reduce vascular risk.

Family screening may also be appropriate when genetic predisposition is suspected. Identification of aneurysmal disease in one family member should prompt careful consideration of imaging in first-degree relatives.

The overarching goal is prevention — identifying disease before rupture or dissection occurs.

Despite these surveillance strategies, not all cases are detected early. When diagnosis is delayed or imaging is not obtained despite warning signs, serious legal questions may arise.

When a Missed Diagnosis Raises Legal Questions

Aortic aneurysm and dissection cases are medically complex. Even under optimal circumstances, outcomes can be poor. Not every rupture or dissection represents medical negligence, and not every delay in diagnosis is preventable.

That said, established cardiovascular guidelines provide a framework for evaluating suspected acute aortic syndromes. When recognized high-risk conditions are present, when characteristic symptom patterns emerge, and when accepted diagnostic steps — particularly definitive imaging — are not obtained or are unreasonably delayed, questions may arise regarding whether the standard of care was met.

The legal analysis in these cases typically focuses on several issues:

• Whether risk factors were documented and appropriately weighed
  
• Whether symptom combinations were properly integrated
  
• Whether available imaging modalities were timely obtained
  
• Whether abnormal findings were recognized and acted upon
  
• Whether treatment was initiated promptly once suspicion arose

In many instances, emergency physicians must make rapid decisions with incomplete information. Courts recognize that reality. However, medicine also relies on structured clinical guidelines precisely to reduce preventable diagnostic error in high-risk conditions.

Failure to integrate symptoms into a unifying diagnosis — particularly when neurologic deficits, pulse discrepancies, or high-risk histories are present — has been repeatedly identified in the medical literature as a source of missed dissection.

Similarly, in abdominal aneurysm cases, the question often centers on whether appropriate imaging would have revealed a treatable condition before rupture occurred.

Each case must be evaluated individually. The medical records, timing of symptoms, imaging studies, and documented decision-making process all require careful review.

Consultation With an Experienced Medical Malpractice Attorney

Aortic dissection and aneurysm cases involve complex medical evidence, emergency department protocols, imaging interpretation, and surgical decision-making. Careful analysis requires familiarity with cardiovascular guidelines, risk stratification principles, and the evolving standards governing emergency care.

If you believe you or a family member has been seriously harmed due to a missed or delayed diagnosis of an aortic aneurysm or aortic dissection, you may wish to seek a legal evaluation.

Our firm reviews cases involving:

• Failure to recognize high-risk symptoms
  
• Failure to obtain appropriate imaging
  
• Delayed surgical consultation
  
• Missed aneurysms on radiologic studies
  
• Inadequate follow-up of known aortic enlargement

We carefully examine whether established medical guidelines were followed and whether earlier intervention might have changed the outcome.

If you would like to discuss a potential case, you may contact us for a confidential, no-obligation consultation. We respond promptly and will review your situation with care and attention to detail.

If you believe you or a family member has been seriously injured from medical malpractice, medical error, or neglect by a doctor, hospital, nurse, clinic, nursing home, or other health care provider, you may want to click here to contact an experienced medical malpractice attorney for a free evaluation of your case. You can also email us at info@patrickmalonelaw.com or call us at 202-742-1500 or 888-625-6635 toll-free. We will respond within 24 hours. There is no charge for our initial consultation.

Sources and Further Reading

The medical principles discussed in this article are supported by established cardiovascular guidelines and peer-reviewed literature, including:

• Hiratzka LF, Bakris GL, Beckman JA, et al.
  2010 ACCF/AHA/AATS/ACR/ASA/SCA/SCAI/SIR/STS/SVM Guidelines for the Diagnosis and Management of Patients With Thoracic Aortic Disease.
  Journal of the American College of Cardiology (2010).
  https://www.jacc.org/doi/full/10.1016/j.jacc.2010.02.015
• Isselbacher EM, Preventza O, Black JH, et al.
  2022 ACC/AHA Guideline for the Diagnosis and Management of Aortic Disease.
  Journal of the American College of Cardiology (2022).
  https://www.jacc.org/doi/10.1016/j.jacc.2022.08.004
• Rogers AM, Hermann LK, Booher AM, et al.
  Sensitivity of the Aortic Dissection Detection Risk Score (ADD-RS) for Identification of Acute Aortic Dissection.
  Circulation.
  https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.111.055806
• Hagan PG, Nienaber CA, Isselbacher EM, et al.
  The International Registry of Acute Aortic Dissection (IRAD): New Insights Into an Old Disease.
  JAMA.
  https://jamanetwork.com/journals/jama/fullarticle/192365
• American Heart Association.
  Thoracic Aortic Aneurysm and Aortic Dissection Information for Patients.
  https://www.heart.org/en/health-topics/aortic-aneurysm
• U.S. Preventive Services Task Force.
  Screening for Abdominal Aortic Aneurysm: Recommendation Statement.
  https://www.uspreventiveservicestaskforce.org/uspstf/recommendation/abdominal-aortic-aneurysm-screening