The late results of arterial embolectomy have been assessed after 46 operations performed on 42 patients over a period of 11 years. The ages of the patients ranged from 38 to 82 years. There were 17 hospital deaths. Among the survivors there was 100% salvage of the imperiled extremities. Since every patient in this series was followed up successfully, complete attrition data were obtained, the survival rate declining progressively to 40% for 5 years and 27% for 11 years. When the operation was delayed eight hours or more after the onset of symptoms the mortality was but little higher than that after immediate operation. The data did not answer the question of whether anticoagulant therapy was preferable to surgery in this situation.