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Carotid cavernous fistulae: indications for urgent treatment
Insights
Certain angiographic features in carotid cavernous fistulae indicate a higher risk of patient death or complications. Identifying these signs, such as pseudoaneurysms or cortical venous drainage, aids in treatment decisions.
Area of Science:
- Vascular Neurology
- Interventional Neuroradiology
- Neuro-ophthalmology
Background:
- Carotid cavernous fistulae (CCF) are abnormal connections between the carotid artery and the cavernous sinus, potentially leading to significant neurological and ophthalmological complications.
- Risk stratification for CCF is crucial for timely and appropriate management to prevent severe morbidity and mortality.
Purpose of the Study:
- To identify specific angiographic and clinical features of carotid cavernous fistulae that correlate with an increased risk of morbidity and mortality.
- To establish a basis for treatment decisions by recognizing high-risk CCF characteristics.
Main Methods:
- Retrospective review of angiographic and clinical data from 155 patients diagnosed with carotid cavernous fistulae.
- Analysis focused on identifying specific angiographic findings and clinical presentations associated with adverse outcomes.
Main Results:
- High-risk angiographic features included pseudoaneurysm, large cavernous sinus varix, cortical venous drainage, and distant venous outflow thrombosis.
- Hazardous clinical signs encompassed increased intracranial pressure, proptosis, diminished visual acuity, hemorrhage, and transient ischemic attacks.
- Cortical venous drainage correlated with increased intracranial pressure and intraparenchymal hemorrhage risk; cavernous sinus varix extension into the subarachnoid space increased fatal subarachnoid hemorrhage risk.
Conclusions:
- Specific angiographic markers, such as pseudoaneurysms and cortical venous drainage, are indicative of a poor prognosis in patients with carotid cavernous fistulae.
- Clinical manifestations like increased intracranial pressure and visual compromise signal a hazardous fistula.
- Recognition of these high-risk features is essential for guiding therapeutic interventions and improving patient outcomes.
Abstract:
Angiographic and clinical data from 155 patients with carotid cavernous fistulae were retrospectively reviewed to determine angiographic features associated with increased risk of morbidity and mortality. These features included presence of a pseudoaneurysm, large varix of the cavernous sinus, venous drainage to cortical veins, and thrombosis of venous outflow pathways distant from the fistula. Clinical signs and symptoms that characterized a hazardous carotid cavernous fistula included increased intracranial pressure, rapidly progressive proptosis, diminished visual acuity, hemorrhage, and transient ischemic attacks. Cortical venous drainage from the carotid cavernous fistula is secondary to occlusion or absence of the normal venous outflow pathways and is associated with signs and symptoms of increased intracranial pressure and an increased risk of intraparenchymal hemorrhage. Angiographic demonstration of a cavernous sinus varix, with extension of the sinus into the subarachnoid space, is associated with an increased risk of fatal subarachnoid hemorrhage. Identification of these high-risk features provides a basis for making decisions about treatment.