Major axis.end systole:Len:Pt:Heart.atrium.right:Qn:US.2D.A4C
major axis.end systole:len:pt:heart.atrium.right:qn:us.2d.a4c
Right atrial Major axis at end systole [Length] by US.2D.A4C
right atrial major axis at end systole [length] by us.2d.a4c