Minor axis.end systole/Body surface area:ArLen:Pt:Heart.atrium.left:Qn:US.M-mode
minor axis.end systole/body surface area:arlen:pt:heart.atrium.left:qn:us.m-mode
Left atrial Minor axis at end systole (by US.M-mode)/Body surface area
left atrial minor axis at end systole (by us.m-mode)/body surface area