Aortic dissection kills within hours when it is not caught. The tear propagates, compromises coronary or carotid flow, and ends in tamponade, stroke, or rupture before the patient reaches the operating suite. Emergency medicine has a diagnostic framework for identifying it, yet studies consistently show that emergency physicians correctly suspect dissection in as few as 15 to 43 percent of presentations before imaging confirms it. When the miss is fatal, the pathway to a medical malpractice case is clear, but the work of proving it requires understanding what the standard of care demanded, why the physician deviated, and where the audit trail of that deviation lives.
The Clinical Picture the ER Should Have Recognized
The American Heart Association and American College of Cardiology have jointly published guidelines on aortic dissection since 2010, with updates through 2022 that are the governing standard in most jurisdictions. Under those guidelines, any patient presenting with sudden-onset, severe chest or back pain, particularly tearing or ripping in quality, should trigger a formal aortic dissection risk score assessment. The ADD-RS (Aortic Dissection Detection Risk Score) assigns one point each for high-risk clinical features, high-risk pain characteristics, and high-risk exam findings. A score of zero still requires clinical judgment; a score of one or higher triggers immediate CT angiography of the chest, abdomen, and pelvis.
The commonly missed presentations are the ones that generate litigation. A patient presenting with what looks like severe acid reflux, interscapular back pain alone, or migrating pain that the triage nurse documents as musculoskeletal will often be placed in a lower-acuity track. The physician orders an EKG and troponin, rules out STEMI and NSTEMI, and reassures the patient. That work-up is entirely appropriate for acute coronary syndrome, and entirely inadequate when dissection is in the differential.
The autopsy or final diagnosis will often include the phrase “Type A aortic dissection with hemopericardium.” The defense will argue the presentation was atypical. Your expert will establish that an atypical presentation is a known variant, that the guidelines account for it, and that the physician's failure to apply the risk score or obtain CTA fell below the applicable standard of care.
Discovery: What the Record Should Contain and What Its Absence Proves
The first discovery demand in an aortic dissection case targets the physician's contemporaneous charting, the triage vital signs and chief complaint documentation, and the ADD-RS scoring sheet, or the absence of one. In most EMR systems, a standardized chest pain evaluation pathway includes a structured risk assessment. Epic and Cerner both carry chest pain order sets that prompt for aortic dissection scoring. If the order set was bypassed, the audit trail will show that the physician opened the chest pain pathway and closed it without completing the structured risk assessment.
Request the full EMR audit trail separately from the medical records. A standard HIPAA authorization produces the clinical record; it does not produce the audit log showing timestamps, what the physician viewed, when they viewed it, and what order sets they bypassed. That audit log is the evidence that the physician saw the triage note and made a choice, not a mistake. Demand it specifically in your records preservation letter and again in formal discovery.
Lab and imaging metadata also matters. If a D-dimer was ordered and returned elevated before the patient deteriorated, and no imaging was ordered in response, that sequence tells a story. CXR findings of mediastinal widening, when present, are noted in radiology reports sometimes hours before the patient codes, giving the jury a timestamp for when the diagnosis was available and went unacted upon.
Expert Sourcing: Who Qualifies to Testify on Standard of Care
The standard-of-care expert in an aortic dissection case is ideally a board-certified emergency medicine physician with experience in high-acuity chest pain evaluation. In cases where the patient was admitted and deteriorated in a monitored unit, an internal medicine or cardiology expert may be needed alongside the emergency medicine opinion.
Do not conflate the emergency medicine standard-of-care expert with the cardiac surgery causation expert. These are separate witnesses with separate opinions. The emergency medicine expert establishes the deviation: no ADD-RS, no CTA despite appropriate risk-stratification triggers. The cardiac surgery expert establishes causation: that with timely diagnosis, the patient was a candidate for emergency surgical repair and had a substantial survival probability. The plaintiff's clinical profile matters here. Type A dissection carries reported surgical survival rates of 85 to 90 percent at high-volume aortic centers when the repair is performed within three hours of symptom onset. Your causation expert needs to testify to what the specific patient's probability was, not a population average.
For additional context on how courts have treated causation standards in failure-to-diagnose cases, see the case law and settlements archive. The causation-in-fact analysis in aortic dissection cases is similar to stroke and MI cases where courts have accepted probabilistic causation frameworks under lost chance doctrine.
Certificate of Merit and Pre-Suit Requirements
Most jurisdictions with certificate-of-merit or pre-suit affidavit requirements will demand an opinion from a qualified expert that the claim has merit before the lawsuit is filed. In aortic dissection cases, the certificate expert must be able to opine on both the emergency medicine standard of care and the causal link to death or permanent injury. A cardiologist who practices exclusively in the cath lab may not satisfy the emergency medicine prong. Vet your certificate expert carefully against the jurisdiction's qualification statute.
Some states require that the defendant physicians receive notice of the claim and a waiting period before suit can be filed. Use that period to complete records collection and retain both the standard-of-care and causation experts before the notice deadline triggers. The factual record in aortic dissection cases is almost entirely constructed from hospital documents and EMR data; there is rarely a scene to inspect or a product to preserve, so the documentary investigation can proceed quickly.
Damages and the Wrongful Death Framework
Aortic dissection victims are disproportionately males between 60 and 80, many with well-documented hypertension or bicuspid aortic valve disease. The defense will attempt to frame the decedent as a high-risk patient whose underlying disease made death likely regardless of treatment. Your economic damages expert and causation expert must address this directly: the issue is not whether the decedent had aortic disease, but whether timely surgical repair was available and would likely have been successful.
Damages in fatal aortic dissection cases turn on the beneficiary structure, the decedent's projected income and household services, and the state's cap structure on non-economic damages. For the family-of-decedent analysis, see the wrongful death resources on this site, which cover beneficiary standing and loss-of-consortium valuation in detail.
Negotiating these cases requires a defendant-friendly opening number based on the pre-surgical survival rates, then a plaintiff-favorable adjustment for the institutional defendant's volume: a community hospital without an on-call cardiac surgery team has a different causation profile than a tertiary center that routinely performs emergency aortic repairs. Frame the damages accordingly, and do not let a cap-conscious early offer close a case that carries a seven-figure exposure at trial.
The missed aortic dissection is one of the cleaner failure-to-diagnose cases in the medical malpractice docket: the guidelines are explicit, the deviation is documentable in the EMR, and the causal link between delayed diagnosis and death is well-supported in the surgical literature. Build the record from the audit trail forward, secure the right experts early, and the case usually speaks for itself.