Reference values for atrial size and volume
| Women | Men | |||||||
| Normal range | Mildly abnormal | Moderately abnormal | Severely abnormal | Normal 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 |
BSA, Body surface area; LA, left atrial; RA, right atrial.
