Long-term sequelae of spontaneous axillary-subclavian venous thrombosis

Background: The frequency and severity of post-thrombotic sequelae after sp ontaneous axillary-subclavian venous thrombosis remain poorly known. Objective: To determine the late sequelae of conventionally treated spontan eous axillary-subclavian venous thrombosis. Design: Cross-sectional study. Setting: University department of vascular medicine. Patients: 54 patients seen during an 18-year period (mean follow-up, 5 year s). Measurements: Scores for the severity of post-thrombotic symptoms were grad ed on a numerical rating scale ranging from 0 to 10 and on a 6-point verbal rating scale. Ultrasonographic sequelae were classified as grade 0, normal flow; grade 1, moderate obstruction; or grade 2, severe obstruction or occ lusion. Results: Verbal scores were "nil/negligible" in 47% of patients and "severe /intolerable" in 13%; numerical scores were 0 to 3 in 78% of patients and 7 to 10 in 9%. Grade 2 ultrasonographic sequelae were found in 22% of cases. No relation was seen between ultrasonographic sequelae and symptom severit y scores. Conclusion: The overall clinical outcome of spontaneous axillary-subclavian venous thrombosis is good, and there is no relation between the severity o f late symptoms and ultrasonographic sequelae.