Late appearance of arterial emboli: diagnosis and management.

Although the occurrence of an arterial embolus is usually a cataclysmic event prompting emergency presentationand early diagnosis, we have managed 22 patients who presented more than 48 hours after the onset of symptoms. The diagnosis was apparent in only six patients. The remainder had subacute limb ischemia, and arteriography was used to help delineate the diagnosis in 14 of these patients. In most instances arteriograms were atypical of chronic occlusive disease, rather than diagnostic of arterial emboli. Embolectomy was performed a mean of 13 days after the onset of symptoms, with retrieval of thromboembolic material in all instances. Two patients died (mortality rate of 9%), and the limb salvage rate for the 25 limbs explored was 88%. Among 22 lower extremity embolectomies, foot pulses were restored in 13 patients (59%), and four patients (18%) had viable extremities without pulses. Adjunctive arterial reconstruction was required in three patients.