[Thoracic aortic dissection revealed by systemic cholesterol embolism]

Area of Science:

• Cardiology
• Vascular Medicine
• Nephrology

Background:

• Systemic cholesterol embolism is a rare but serious complication of atherosclerosis.
• While arterial catheterization is a known cause, its association with aortic dissection is exceptionally rare.
• Cholesterol embolism syndrome presents with diverse clinical manifestations.

Observation:

• A 70-year-old male with cardiovascular risk factors presented with purpuric lesions and acute renal failure, indicative of cholesterol embolism syndrome.
• The patient had a history of coronary angioplasty and was found to have a descending thoracic aortic dissection with complex atheroma via transoesophageal echocardiography.
• Clinical progression included digital ischemia and worsening renal failure necessitating hemodialysis.

Findings:

• Transoesophageal echocardiography is crucial for diagnosing aortic dissection, especially in patients without typical thoracic symptoms.
• Cholesterol embolism syndrome can be an unusual presenting sign of underlying aortic dissection.
• Rupture of the intimal flap of the aortic dissection was confirmed on follow-up imaging.

Implications:

• This case underscores the need for thorough cardiovascular evaluation in patients diagnosed with cholesterol embolism syndrome.
• Transoesophageal echocardiography serves as a valuable, non-invasive tool for detecting aortic pathology in this context.
• Recognizing this rare association can lead to earlier diagnosis and management of potentially life-threatening aortic dissections.