It is usually calculated as left atrial volume index in terms of body surface area.
The left atrial volume is commonly measured by echocardiography or magnetic resonance tomography.
[1] Usually, the volume of the left atrium is divided by the body surface area in order to provide an extensive property, which is independent from body size.
Moderately increased LAVI (63 to 73 mL/m2) is associated with slightly elevated mortality hazard and severely increased LAVI (>73 mL/m2) with significantly higher hazard ratio of mortality.
[2] LAVI predicts survival after acute myocardial infarction,[4] postoperative atrial fibrillation in subjects undergoing heart surgery,[5] atrial fibrillation and stroke[6] as well as hospital admission in ambulatory patients.