What can be done to improve diagnosis of aortic dissection?

Aortic dissection (AD) is rare. Missed AD is a common reason for coronial investigations and civil claims for medical negligence. Recommendations include improved education, supervision and information transfer, reminders in chest pain pathways and higher rates of investigation for AD. Higher investigation rates pose risks to patients and the health system which may not be in balance with the likelihood of AD. The appropriate diagnostic yield of investigation to balance risk and benefit has not been defined. The AD detection risk score pathway has been proposed as a useful diagnostic tool but concerns about its derivation, validation and utility remain. In this paper, we try to draw together published literature and local audit data to develop recommendations about what might be done to reduce the number of missed AD cases in EDs and what the impact of higher investigation rates might be.

MDCT Imaging of Non-Traumatic Thoracic Aortic Emergencies and Its Impact on Diagnosis and Management—A Reappraisal

Non-traumatic thoracic aorta emergencies are associated with significant morbidity and mortality. Diseases of the intimomedial layers (aortic dissection and variants) have been grouped under the common term of acute aortic syndrome because they are life-threatening conditions clinically indistinguishable on presentation. Patients with aortic dissection may present with a wide variety of symptoms secondary to the pattern of dissection and end organ malperfusion. Other conditions may be seen in patients with acute symptoms, including ruptured and unstable thoracic aortic aneurysm, iatrogenic or infective pseudoaneurysms, aortic fistula, acute aortic thrombus/occlusive disease, and vasculitis. Imaging plays a pivotal role in the patient’s management and care. In the emergency room, chest X-ray is the initial imaging test offering a screening evaluation for alternative common differential diagnoses and a preliminary assessment of the mediastinal dimensions. State-of-the-art multidetector computed tomography angiography (CTA) provides a widely available, rapid, replicable, noninvasive diagnostic imaging with sensitivity approaching 100%. It is an impressive tool in decision-making process with a deep impact on treatment including endovascular or open surgical or conservative treatment. Radiologists must be familiar with the spectrum of these entities to help triage patients appropriately and efficiently. Understanding the imaging findings and proper measurement techniques allow the radiologist to suggest the most appropriate next management step.