Long-term observations in cases with spontaneous carotid-cavernous fistulas

Area of Science:

• Neurology
• Vascular Surgery
• Interventional Radiology

Background:

• Spontaneous carotid-cavernous fistulas (CCFs) are abnormal connections between the carotid artery and the cavernous sinus.
• Understanding the natural history and optimal management of CCFs is crucial for patient outcomes.

Purpose of the Study:

• To evaluate the natural course and regression patterns of spontaneous carotid-cavernous fistulas.
• To identify factors influencing symptom regression in CCF patients.
• To assess the efficacy of initial conservative treatments for specific CCF presentations.

Main Methods:

• A retrospective follow-up study of 26 patients diagnosed with spontaneous carotid-cavernous fistulas.
• Patient data collected over periods ranging from 4 months to 9 years and 8 months.
• Analysis of clinical symptoms, hemodynamic parameters, and treatment interventions.

Main Results:

• Complete symptom regression occurred in 19 out of 26 cases (73%).
• Partial improvement was observed in 5 cases (19%), while 2 cases (8%) had persistent symptoms.
• Delayed regression was noted in younger patients (<60 years), slow-onset symptoms, and cases with multiple draining veins.

Conclusions:

• Spontaneous carotid-cavernous fistulas often exhibit a favorable natural history with a high rate of symptom regression.
• Minor hemodynamic alterations can precipitate symptom resolution.
• Cervical carotid artery compression or temporary balloon occlusion are effective first-line treatments for low-pressure, low-flow CCFs.