Left Atrial Volume by Area-Lengh

Referrence Values

 LA Volume Index (mL/m2) Normal 14-34 Mildly abnormal 35-41 Moderately abnormal 42-48 Severely abnormal >48

Formulas

$LA \hspace{0.2cm}Volume = \frac{8}{3\pi} \times \frac{Area_1 \times Area_2}{Length}$

$LA \hspace{0.2cm}Volume\hspace{0.2cm}Index= \frac{LA \hspace{0.2cm} Volume}{BSA}$

Definitions

 LA Left atrium BSA Body surface area using the Mosteller formula

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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Developer & Illustrator: Sirikarn Napan, MD, FACC