When is the left atrial volume considered enlarged?

The left atrial volume is considered enlarged when it exceeds 34 mL/m². This measurement is important in the assessment of cardiac function and is a key indicator of various cardiovascular diseases. An increased left atrial volume can indicate conditions such as left ventricular dysfunction, atrial fibrillation, or increased filling pressures within the heart, among others.

In clinical practice, the left atrial volume index (LAVI) is used to normalize the left atrial volume to body surface area, allowing for a more accurate assessment across individuals with different body sizes. A volume greater than 34 mL/m² suggests that there may be structural or functional abnormalities, requiring further investigation.

Understanding these thresholds is essential for diagnosing and managing patients with potential heart conditions, as an enlarged left atrium can predispose patients to complications such as stroke or heart failure.