Cardiac output:VRat:Pt:Heart.ventricle.left:Qn:US.2D.A2C+Calc by single plane area-length method
cardiac output:vrat:pt:heart.ventricle.left:qn:us.2d.a2c+calc by single plane area-length method
LV Output A2C SP A-L
lv output a2c sp a-l