|LA max||Mitral opening|
|LA min||Mitral closure|
|LA reservoir||LA max-LA min|
|LA conduit||LASV (Vmax–Vmin)|
|LA at atrial systole||P wave|
|LA stroke volume (LASV, active emptying)||LA at P-LA min|
|LA active emptying fraction||LASV/LA at P|
|LA passive emptying||LA max –LA at P|
Left atrial (LA) volumes as determined at the mitral valve opening (maximal, Vmax), at the onset of atrial systole (P wave of the electrocardiogram), and at mitral valve closure (minimal, Vmin).
LASV = left atrium stroke volume.