Left Atrium

Left atrial dimensions

	Women				Men
	Reference range	Mildly abnormal	Moderately abnormal	Severely abnormal	Reference range	Mildly abnormal	Moderately abnormal	Severely abnormal
Atrial dimensions
LA diameter, cm	2.7–3.8	3.9–4.2	4.3–4.6	≥4.7	3.0–4.0	4.1–4.6	4.7–5.2	≥5.2
LA diameter/BSA, cm/m2	1.5–2.3	2.4–2.6	2.7–2.9	≥3.0	1.5–2.3	2.4–2.6	2.7–2.9	≥3.0
RA minor-axis dimension, cm	2.9–4.5	4.6–4.9	5.0–5.4	≥5.5	2.9–4.5	4.6–4.9	5.0–5.4	≥5.5
RA minor-axis dimension/BSA, cm/m2	1.7–2.5	2.6–2.8	2.9–3.1	≥3.2	1.7–2.5	2.6–2.8	2.9–3.1	≥3.2
Atrial area
LA area, cm2	≤20	20–30	30–40	>40	≤20	20–30	30–40	>40
Atrial volumes
LA volume, mL	22–52	53–62	63–72	≥73	18–58	59–68	69–78	≥79	LA volume/BSA, mL/m2	22 ± 6	29–33	34–39	≥40	22 ± 6	29–33	34–39	≥40
Bold values: Recommended and best validated.

Left atrial pressure (LAP) [1]

Click here for calculation of LA pressure by mitral regurgitation.

References

1. Nagueh SF, Appleton CP, Gillebert TC, Marino PN, Oh JK, Smiseth OA, Waggoner AD, Flachskampf FA, Pellikka PA, and Evangelista A. Recommendations for the evaluation of left ventricular diastolic function by echocardiography. J Am Soc Echocardiogr. 2009 Feb;22(2):107-33. DOI:10.1016/j.echo.2008.11.023 |