Left Atrial Volume by Area-Lengh

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Data Acquisition

LV volume measurement

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