Acute aortic occlusion. A 40-year experience.

OBJECTIVE

To review a large experience with acute aortic occlusion (AAO) to better define the cause, clinical presentation, treatment, prognostic variables, and outcome.

DESIGN

Retrospective review of 46 consecutive patients with AAO during a 40-year period.

SETTING

A large urban tertiary care referral center in Detroit, Mich.

PATIENTS

Adult patients with arteriographic and/or operative confirmation of acute occlusion of the abdominal aorta plus signs and symptoms of acute ischemia.

INTERVENTION

Operative and nonoperative treatment of AAO.

MAIN OUTCOME MEASURES

Mortality, morbidity, and long-term survival. Other variables measured included cause, risk factors, and effects of duration and severity of ischemia and treatment methods on outcome.

RESULTS

Two primary causes were identified--embolism (65%) and thrombosis (35%). Heart disease and female gender were risk factors for embolism, while smoking and diabetes were risk factors for thrombosis. Severity of ischemia on presentation correlated better with outcome than duration of ischemia. The hospital mortality rate was 35% and morbidity, 74%, with no difference between the two groups. Recurrent arterial embolism occurred in 43% of patients with embolic AAO. Seventy-two percent of AAO survivors were alive 5 years after therapy.

CONCLUSIONS

Acute aortic occlusion remains a serious vascular surgical emergency with significant morbidity and mortality, even when recognized promptly and treated appropriately. Nevertheless, survivors have a reasonable long-term outcome. Permanent anticoagulation is suggested in patients with embolic AAO to minimize a high incidence of recurrent arterial embolism.