alexa Atherosclerosis in abdominal aortic aneurysms: a causal event or a process running in parallel? The Tromsø study.
Cardiology

Cardiology

Journal of Clinical & Experimental Cardiology

Author(s): Johnsen SH, Forsdahl SH, Singh K, Jacobsen BK

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Abstract OBJECTIVE: The pathogenesis of abdominal aortic aneurysm (AAA) formation is poorly understood. We investigated the relationship between carotid, femoral, and coronary atherosclerosis and abdominal aortic diameter, and whether atherosclerosis was a risk marker for AAA. METHODS AND RESULTS: Ultrasound of the right carotid artery, the common femoral artery, and the abdominal aorta was performed in 6446 men and women from a general population. The burden of atherosclerosis was assessed as carotid total plaque area, common femoral lumen diameter, and self-reported coronary heart disease. An AAA was defined as maximal infrarenal aortic diameter > or =30 mm. No dose-response relationship was found between carotid atherosclerosis and abdominal aortic diameter <27 mm. However, significantly more atherosclerosis and coronary heart disease was found in aortic diameter > or =27 mm and in AAAs. The age- and sex-adjusted odds ratio (OR) (95\% CI) for AAA in the top total plaque area quintile was 2.3 (1.5 to 3.4), as compared with subjects without plaques. The adjusted OR (95\% CI) was 1.7 (1.1 to 2.6). No independent association was found between femoral lumen diameter and AAA. CONCLUSIONS: The lack of a consistent dose-response relationship between atherosclerosis and abdominal aortic diameter suggests that atherosclerosis may not be a causal event in AAA but develops in parallel with or secondary to aneurismal dilatation. This article was published in Arterioscler Thromb Vasc Biol and referenced in Journal of Clinical & Experimental Cardiology

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