Severe Left Atrial Dilatation by Left Atrial Volume Index
Severely dilated left atrium is defined by a maximum left atrial volume indexed to body surface area (LAVI) >48 mL/m². [1]
Measurement Definition
The threshold applies to maximum LA volume/BSA measured at end-systole. [1]
Practical Threshold Values
- Normal: 16–34 mL/m². [1]
- Mildly abnormal: 35–41 mL/m². [1]
- Moderately abnormal: 42–48 mL/m². [1]
- Severely abnormal: >48 mL/m². [1]