Aortic Root Index

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Data Acquisition

Aortic root

Reference Values

Normal Aortic Root Index (cm/m2)
Aortic Root Men Women
Annulus 1.3 ± 0.1 1.3 ± 0.1
Sinuses of Valsalva 1.7 ± 0.2 1.8 ± 0.2
Sinotubular junction 1.5  ± 0.2 1.5 ± 0.2
Proximal ascending aorta 1.5 ± 0.2 1.6 ± 0.3

Formula

\[ARI = \frac{Ao \hspace{0.2cm} Root \hspace{0.2cm} diameter}{BSA}\]

Definitions

Ao Aorta
ARI Aortic root index
BSA Body surface area using the Mosteller formula

Related Tools

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Reference

1. Lang RM et al. Recommendations for cardiac chamber quantification by echocardiography in adults: an update from the American Society of Echocardiography and the European Association of Cardiovascular Imaging. J Am Soc Echocardiogr. 2015 Jan;28(1):1-39. Full text

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