Objective:

To determine relationship between Aortic Index (IA) and ruptured Abdominal Aortic Aneurysm (AAA) in Mexican population from the Angiology Service, Centro Médico Nacional Siglo XXI.

Methods:

Retrospective study in records of patients operated for AAA, with variables such as age, gender, smoking index, comorbidities, AI, maximum aortic diameter (MAD), perioperative, rupture and mortality. The AI was calculated with somatometry and MAD by angiotomography; and demographic description of population with analysis between AI and rupture.

Results:

93 cases (76.3% men) with smoking (80.6%), high blood pressure (60.2%) and previous abdominal surgery (75.2%) were studied as the most frequent comorbidities. Emergency procedures in 34.4% with general mortality at 24 hours postoperatively of 11.8%. 31.2% presented diagnosis of ruptured aneurysm with an average MAD of 69 mm. Post-surgical complications were respiratory, ischemic and renal with 30.1, 23.7 and 9.7% respectively; and a stay <14 days in 77.4%. The AI presented statistically significant difference (p <0.001, 95% CI) between groups with and without rupture; determining an AI ≥4 with odds ratio of 4.8 for AAA rupture, with sensitivity and specificity of 71.8 and 65.5%.

Conclusion:

An aortic index ≥4 has a higher risk of rupture in AAA, establishing it as an acceptable predictor parameter.

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