Aortic Root Index

– share this tool –

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


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


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


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


We are doing our best to prepare the content of this website. However, Cardiology Connections, Corp cannot warranty the expressions and suggestions of the contents, as well as its accuracy. In addition, to the extent permitted by the law, Cardiology Connections, Corp shall not be responsible for any losses and/or damages due to the usage of the information on our website. Furthermore, the links contained on our website may lead to external sites, which are provided for convenience only. Any information or statements that appeared in these sites are not sponsored, endorsed, or otherwise approved by Cardiology Connections, Corp. For these external sites, Cardiology Connections, Corp cannot be held liable for the availability of, or the content located on or through it. Plus, any losses or damages occurred from using these contents or the internet generally.

Developer & Illustrator: Sirikarn Napan, MD, FACC