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A0012 Determinants of descending thoracic aortic size measured by echocardiography

Ejim, Emmanuel1; Oguanobi, Nelson1; Ubani-Ukoma, Chidi2; Chigbo, Ejindu3; Udora, Nneka4

doi: 10.1097/01.hjh.0000548372.77151.7b

Objectives: The relationship between increasing aortic size and risk of spontaneous rupture/dissection has been well documented. Assessment of the sizes of the segments of the thoracic aorta is an essential part of every echocardiographic examination. There is a dearth of data on factors affecting the size of the thoracic aorta in this part of the world

Methods: Echocardiographic reports of 167 consecutive subjects were retrospectively reviewed. Transthoracic echocardiography was done with a Siemens CV 70 echocardiographic machine. Data obtained included age, gender, weight, height, body mass index, systolic and diastolic blood pressures, and heart rate. The mean arterial pressure and pulse pressure were calculated from these parameters. Data were presented as means ± standard deviation for continuous variables and as proportions for categorical variables.

Results: A total of 167 individuals aged between 12 to 96 years were studied, comprising 94 males and 73 females with mean ages of 51.64 ± 16.31 and 46.90 ± 15.77 respectively, (p < .001). Male participants were significantly older and had higher anthropometrical indices, but there was no significant difference in body mass index. The mean descending thoracic aortic dimension was 23.35 ± 3.73 mm. This aortic measurement was significantly higher in the male subjects. A multivariate correlation analysis revealed significant correlations between descending thoracic aortic dimension and age, weight, body mass index, systolic blood pressure, diastolic blood pressure, pulse pressure, and mean arterial blood pressure. These relationships were further explored using regression models, and a linear relationship between age and descending thoracic dimension was noted.

Conclusion: Age, body weight, and gender significantly affect the size of the descending thoracic aorta

1Medicine University of Nigeria Nigeria

2Medicine Abia State University Teaching Hospital Nigeria

3Medicine Enugu State University Teaching Hospital Nigeria

4Medicine University of Nigeria Teaching Hospital Nigeria

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