In a woman in her 40s presenting with mid‑epigastric pain that worsens with palpation and when supine, accompanied by dyspnea, palpitations, tachycardia, and an audible carotid pulse, how should I diagnose a possible aortic aneurysm?

Diagnosis of Aortic Aneurysm

For this woman in her 40s with mid-epigastric pain, dyspnea, palpitations, and tachycardia, obtain immediate CT angiography (CTA) of the chest and abdomen to diagnose or exclude an acute aortic syndrome, as this is the gold standard imaging modality with the highest accuracy, speed, and availability. 1

Initial Diagnostic Approach

Clinical Risk Assessment

The presentation described—mid-epigastric pain worsening with palpation and when supine, accompanied by dyspnea, palpitations, tachycardia, and audible carotid pulse—raises concern for acute aortic syndrome (AAS), which includes aortic dissection, intramural hematoma, and penetrating aortic ulcer. While abdominal aortic aneurysm (AAA) is less common in women in their 40s, the acute presentation demands urgent evaluation.

Consider using an aortic dissection risk score (ADD-RS or AORTAs score) to stratify risk, though these have not been uniformly adopted. A low risk score combined with D-dimer <500 ng/mL makes AAS unlikely, but given the acute presentation with hemodynamic symptoms, proceed directly to imaging rather than relying on risk stratification alone. 1

Imaging Algorithm

First-line imaging: CT angiography

• CT is the recommended initial diagnostic test for suspected AAS due to its wide availability 24/7 in emergency departments, rapid acquisition time, and superior anatomic detail 1
• CT provides comprehensive information including:
  • Full extent of any dissection or aneurysm
  • Entry tear site location
  • Branch vessel involvement and patency
  • Signs of malperfusion
  • Pericardial effusion or hemopericardium
  • Periaortic or mediastinal hematoma
  • Pleural effusion

Alternative imaging modalities:

• Transesophageal echocardiography (TEE) is reasonable when:

  • Patient has iodinated contrast allergy
  • Patient is too unstable to transport to radiology suite
  • Bedside evaluation is needed in the emergency department or operating room 1

• MRI is typically reserved for:

  • Stable patients with contraindication to iodinated contrast
  • Follow-up imaging when diagnostic uncertainty exists
  • MRI is less practical acutely due to limited availability, longer acquisition times, and difficulty monitoring unstable patients in the scanner 1

Specific Considerations for Abdominal Aortic Aneurysm

If the clinical suspicion is specifically for non-ruptured AAA (defined as infrarenal aortic diameter ≥3.0 cm):

• Ultrasound is the appropriate initial imaging modality for suspected AAA when the presentation is less acute 2
• However, given this patient's acute symptoms with hemodynamic compromise (tachycardia, dyspnea, palpitations), CT angiography remains preferred to evaluate for rupture or impending rupture

Critical Pitfalls to Avoid

1. Do not rely on chest X-ray for diagnosis: Plain radiography is neither sufficiently sensitive nor specific for AAS, though it may raise suspicion or suggest alternative diagnoses 1

2. Do not delay imaging for risk stratification: In a patient with acute symptoms and hemodynamic changes, proceed directly to definitive imaging rather than spending time on clinical scoring systems

3. Do not use aortography: This invasive technique has significantly lower sensitivity than modern cross-sectional imaging and is rarely indicated 1

4. Consider the full differential: While evaluating for aortic pathology, recognize that mid-epigastric pain in a woman this age could represent other acute conditions, but the combination with cardiovascular symptoms (dyspnea, palpitations, tachycardia, audible carotid pulse) makes aortic pathology the priority to exclude

Immediate Management Considerations

If AAS is confirmed on imaging, initiate anti-impulse therapy immediately with invasive blood pressure monitoring via arterial line in an ICU setting to decrease aortic wall stress, even before definitive surgical consultation 1

The key is recognizing that this acute presentation with hemodynamic symptoms demands urgent imaging—CT angiography provides the fastest, most comprehensive evaluation to guide immediate management decisions regarding potential surgical intervention.