Variation of infrarenal aortic diameter: A necropsy study

Abstract

The infrarenal aortic diameter enlarges with aging, and this enlargement occurs earlier in men than in women. Those subjects who had a longer body length and advanced sclerosis on the aorta wall had larger aortic diameters. There was a high prevalence of infrarenal aneurysms (4.5%), with rupture found solely in aortas with diameters larger than 5.0 cm.

Contribuição dos grandes vasos arteriais na adaptação cardiovascular a ortostase

“…These authors observed that the wave shape, the aortic impedance and the PWV in these primates were different when compared to those of humans 84 . A signifi cant difference demonstrated in this study was that the dimension of the abdominal aorta was only slightly smaller than that of the thoracic aorta in comparison with those of humans, in whom the aorta presents a cuneiform aspect, with its abdominal segment, located below the renal arteries, presenting a markedly decreased diameter when compared to that of the lower portion of the thoracic aorta 85,86 . This fi nding would be responsible for a low coeffi cient of aortic refl ection at the level of the renal arteries in baboons, a fi nding that could be accountable for the differences observed in humans.…”

Thoracic and abdominal aortic dimension in 70-year-old men and women – A population-based whole-body magnetic resonance imaging (MRI) study

“…23 In a study by Sonesson et al, the infrarenal aortic diameter in 146 healthy subjects aged 4 to 74 years was measured with US. The diameter increased by 25% between the age of 25 and 70, and was predicted to be 1.2 to 2.7 cm in subjects aged 70 years, depending on gender and body size.…”

Different Patterns of Atherosclerotic Remodeling in the Thoracic and Abdominal Aorta

“…Previous reports have noted a direct correlation between the aortic diameter, both in thoracic and abdominal segments, and the age of the patient and extent of atherosclerosis. [8][9][10] However, these studies focused on the general population instead of patients presenting atherosclerotic disease in attempts to elucidate the mechanisms involved in the pathogenesis of aortic aneurysm.…”

“…2 These two possibilities of pathologic changes in aortic diameter related to severe atherosclerosis have not been considered by previous investigations that established a direct correlation between the vascular diameter and the extent of lesions suggesting the occurrence of positive remodeling with the progression of atherosclerosis. [8][9][10] The objective of this study was to separately evaluate the relationship between the aortic diameter in the thoracic and abdominal segments, and the extent and histological characteristics of atherosclerosis in patients presenting with atherosclerotic disease.…”